diff --git a/Cargo.lock b/Cargo.lock
index 5fdcbb10db..f653eb2d3d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -94,9 +94,9 @@ dependencies = [
 
 [[package]]
 name = "anstream"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e579a7752471abc2a8268df8b20005e3eadd975f585398f17efcfd8d4927371"
+checksum = "6342bd4f5a1205d7f41e94a41a901f5647c938cdfa96036338e8533c9d6c2450"
 dependencies = [
  "anstyle",
  "anstyle-parse",
@@ -133,9 +133,9 @@ dependencies = [
 
 [[package]]
 name = "anstyle-wincon"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4bcd8291a340dd8ac70e18878bc4501dd7b4ff970cfa21c207d36ece51ea88fd"
+checksum = "180abfa45703aebe0093f79badacc01b8fd4ea2e35118747e5811127f926e188"
 dependencies = [
  "anstyle",
  "windows-sys 0.48.0",
@@ -194,7 +194,7 @@ checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -371,9 +371,9 @@ checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
 
 [[package]]
 name = "bumpalo"
-version = "3.12.0"
+version = "3.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d261e256854913907f67ed06efbc3338dfe6179796deefc1ff763fc1aee5535"
+checksum = "9b1ce199063694f33ffb7dd4e0ee620741495c32833cde5aa08f02a0bf96f0c8"
 
 [[package]]
 name = "byte-slice-cast"
@@ -502,7 +502,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -605,9 +605,9 @@ dependencies = [
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "280a9f2d8b3a38871a3c8a46fb80db65e5e5ed97da80c4d08bf27fb63e35e181"
+checksum = "3e4c1eaa2012c47becbbad2ab175484c2a84d1185b566fb2cc5b8707343dfe58"
 dependencies = [
  "libc",
 ]
@@ -805,7 +805,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "scratch",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -822,7 +822,7 @@ checksum = "2345488264226bf682893e25de0769f3360aac9957980ec49361b083ddaa5bc5"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -1148,7 +1148,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -1309,9 +1309,9 @@ dependencies = [
 
 [[package]]
 name = "h2"
-version = "0.3.17"
+version = "0.3.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66b91535aa35fea1523ad1b86cb6b53c28e0ae566ba4a460f4457e936cad7c6f"
+checksum = "17f8a914c2987b688368b5138aa05321db91f4090cf26118185672ad588bce21"
 dependencies = [
  "bytes",
  "fnv",
@@ -1477,9 +1477,9 @@ checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
 [[package]]
 name = "hyper"
-version = "0.14.25"
+version = "0.14.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc5e554ff619822309ffd57d8734d77cd5ce6238bc956f037ea06c58238c9899"
+checksum = "ab302d72a6f11a3b910431ff93aae7e773078c769f0a3ef15fb9ec692ed147d4"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -1656,7 +1656,7 @@ checksum = "adcf93614601c8129ddf72e2d5633df827ba6551541c6d8c59520a371475be1f"
 dependencies = [
  "hermit-abi 0.3.1",
  "io-lifetimes",
- "rustix 0.37.11",
+ "rustix 0.37.14",
  "windows-sys 0.48.0",
 ]
 
@@ -1795,9 +1795,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.141"
+version = "0.2.142"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3304a64d199bb964be99741b7a14d26972741915b3649639149b2479bb46f4b5"
+checksum = "6a987beff54b60ffa6d51982e1aa1146bc42f19bd26be28b0586f252fccf5317"
 
 [[package]]
 name = "libm"
@@ -1870,9 +1870,9 @@ checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.3.1"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d59d8c75012853d2e872fb56bc8a2e53718e2cafe1a4c823143141c6d90c322f"
+checksum = "36eb31c1778188ae1e64398743890d0877fef36d11521ac60406b42016e8c2cf"
 
 [[package]]
 name = "lock_api"
@@ -1923,7 +1923,7 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ffc89ccdc6e10d6907450f753537ebc5c5d3460d2e4e62ea74bd571db62c0f9e"
 dependencies = [
- "rustix 0.37.11",
+ "rustix 0.37.14",
 ]
 
 [[package]]
@@ -2511,7 +2511,7 @@ checksum = "8d2275aab483050ab2a7364c1a46604865ee7d6906684e08db0f090acf74f9e7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -2563,9 +2563,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.22"
+version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4a36c42d1873f9a77c53bde094f9664d9891bc604a45b4798fd2c389ed12e5b"
+checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
 
 [[package]]
 name = "rustc-hash"
@@ -2581,9 +2581,9 @@ checksum = "3e75f6a532d0fd9f7f13144f392b6ad56a32696bfcd9c78f797f16bbb6f072d6"
 
 [[package]]
 name = "rustix"
-version = "0.36.12"
+version = "0.36.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0af200a3324fa5bcd922e84e9b55a298ea9f431a489f01961acdebc6e908f25"
+checksum = "3a38f9520be93aba504e8ca974197f46158de5dcaa9fa04b57c57cd6a679d658"
 dependencies = [
  "bitflags",
  "errno",
@@ -2595,15 +2595,15 @@ dependencies = [
 
 [[package]]
 name = "rustix"
-version = "0.37.11"
+version = "0.37.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85597d61f83914ddeba6a47b3b8ffe7365107221c2e557ed94426489fefb5f77"
+checksum = "d9b864d3c18a5785a05953adeed93e2dca37ed30f18e69bba9f30079d51f363f"
 dependencies = [
  "bitflags",
  "errno",
  "io-lifetimes",
  "libc",
- "linux-raw-sys 0.3.1",
+ "linux-raw-sys 0.3.4",
  "windows-sys 0.48.0",
 ]
 
@@ -2903,7 +2903,7 @@ checksum = "291a097c63d8497e00160b166a967a4a79c64f3facdd01cbd7502231688d77df"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -2968,9 +2968,9 @@ dependencies = [
 
 [[package]]
 name = "sha3"
-version = "0.10.6"
+version = "0.10.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdf0c33fae925bdc080598b84bc15c55e7b9a4a43b3c704da051f977469691c9"
+checksum = "54c2bb1a323307527314a36bfb73f24febb08ce2b8a554bf4ffd6f51ad15198c"
 dependencies = [
  "digest 0.10.6",
  "keccak",
@@ -3624,9 +3624,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.14"
+version = "2.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcf316d5356ed6847742d036f8a39c3b8435cac10bd528a4bd461928a6ab34d5"
+checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3641,9 +3641,9 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
 name = "target-lexicon"
-version = "0.12.6"
+version = "0.12.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ae9980cab1db3fceee2f6c6f643d5d8de2997c58ee8d25fb0cc8a9e9e7348e5"
+checksum = "fd1ba337640d60c3e96bc6f0638a939b9c9a7f2c316a1598c279828b3d1dc8c5"
 
 [[package]]
 name = "termcolor"
@@ -3690,7 +3690,7 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -3772,7 +3772,7 @@ checksum = "61a573bdc87985e9d6ddeed1b3d864e8a302c847e40d647746df2f1de209d1ce"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -3838,13 +3838,13 @@ dependencies = [
 
 [[package]]
 name = "tracing-attributes"
-version = "0.1.23"
+version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4017f8f45139870ca7e672686113917c71c7a6e02d4924eda67186083c03081a"
+checksum = "0f57e3ca2a01450b1a921183a9c9cbfda207fd822cef4ccb00a65402cbba7a74"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.15",
 ]
 
 [[package]]
@@ -4354,7 +4354,7 @@ dependencies = [
  "memoffset 0.6.5",
  "paste",
  "rand 0.8.5",
- "rustix 0.36.12",
+ "rustix 0.36.13",
  "wasmtime-asm-macros",
  "wasmtime-environ",
  "wasmtime-jit-debug",
@@ -4647,5 +4647,5 @@ checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.14",
+ "syn 2.0.15",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 615bdb5ef4..2ef504d706 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,14 +11,79 @@ members = [
     "metadata",
     "subxt"
 ]
+
+# This cannot be a workspace dependency, because it requires
+# mutually exclusive jsonrpsee features to work, and workspaces
+# will aggregate features used across crates:
 exclude = ["testing/wasm-tests"]
 resolver = "2"
 
 [workspace.package]
 authors = ["Parity Technologies <admin@parity.io>"]
 edition = "2021"
+version = "0.28.0"
 rust-version = "1.64.0"
 license = "Apache-2.0 OR GPL-3.0"
 repository = "https://github.com/paritytech/subxt"
 documentation = "https://docs.rs/subxt"
 homepage = "https://www.parity.io/"
+
+[workspace.dependencies]
+assert_matches = "1.5.0"
+base58 = { version = "0.2.0" }
+bitvec = { version = "1", default-features = false }
+blake2 = { version = "0.10.4", default-features = false }
+clap = { version = "4.2.4", features = ["derive", "cargo"] }
+criterion = "0.4"
+codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
+color-eyre = "0.6.1"
+console_error_panic_hook = "0.1.7"
+darling = "0.14.4"
+derivative = "2.2.0"
+either = "1.8.1"
+frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
+futures = { version = "0.3.27", default-features = false, features = ["std"] }
+getrandom = "0.2"
+hex = "0.4.3"
+heck = "0.4.1"
+impl-serde = { version = "0.4.0" }
+jsonrpsee = { version = "0.16" }
+parking_lot = "0.12.0"
+pretty_assertions = "1.0.0"
+primitive-types = { version = "0.12.1", default-features = false, features = ["codec", "scale-info", "serde"] }
+proc-macro2 = "1.0.55"
+quote = "1.0.8"
+regex = "1.8.1"
+scale-info = "2.5.0"
+scale-value = "0.7.0"
+scale-bits = "0.3"
+scale-decode = "0.5.0"
+scale-encode = "0.1.0"
+serde = { version = "1.0.159" }
+serde_json = { version = "1.0.96" }
+syn = "1.0.109"
+thiserror = "1.0.40"
+tokio = { version = "1.27", features = ["macros", "time", "rt-multi-thread"] }
+tracing = "0.1.34"
+tracing-wasm = "0.2.1"
+tracing-subscriber = "0.3.17"
+trybuild = "1.0.79"
+proc-macro-error = "1.0.4"
+wabt = "0.10.0"
+wasm-bindgen-test = "0.3.24"
+which = "4.4.0"
+
+# Substrate crates:
+sp-core = { version = "20.0.0", default-features = false }
+sp-core-hashing = "8.0.0"
+sp-keyring = "23.0.0"
+sp-runtime = "23.0.0"
+sp-version = "21.0.0"
+
+# Subxt workspace crates:
+subxt = { version = "0.28.0", path = "subxt" }
+subxt-macro = { version = "0.28.0", path = "macro" }
+subxt-metadata = { version = "0.28.0", path = "metadata" }
+subxt-codegen = { version = "0.28.0", path = "codegen" }
+test-runtime = { path = "testing/test-runtime" }
+substrate-runner = { path = "testing/substrate-runner" }
\ No newline at end of file
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index e7bb346556..718b3df7af 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt-cli"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -17,27 +17,15 @@ name = "subxt"
 path = "src/main.rs"
 
 [dependencies]
-# perform subxt codegen
-subxt-codegen = { version = "0.28.0", path = "../codegen" }
-# perform node compatibility
-subxt-metadata = { version = "0.28.0", path = "../metadata" }
-# parse command line args
-clap = { version = "4.2.4", features = ["derive", "cargo"] }
-# colourful error reports
-color-eyre = "0.6.1"
-# serialize the metadata
-serde = { version = "1.0.159", features = ["derive"] }
-# serialize as json
-serde_json = "1.0.96"
-# hex encoded metadata to bytes
-hex = "0.4.3"
-# actual metadata types
-frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
-# decode bytes into the metadata types
-scale = { package = "parity-scale-codec", version = "3.0.0", default-features = false }
-# generate the item mod for codegen
-syn = "1.0.109"
-# communicate with the substrate nodes
-jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport", "http-client"] }
-# async runtime
-tokio = { version = "1.27", features = ["rt-multi-thread", "macros", "time"] }
+subxt-codegen = { workspace = true }
+subxt-metadata = { workspace = true }
+clap = { workspace = true }
+serde = { workspace = true, features = ["derive"] }
+color-eyre = { workspace = true }
+serde_json = { workspace = true }
+hex = { workspace = true }
+frame-metadata = { workspace = true }
+codec = { package = "parity-scale-codec", workspace = true }
+syn = { workspace = true }
+jsonrpsee = { workspace = true, features = ["async-client", "client-ws-transport", "http-client"] }
+tokio = { workspace = true }
diff --git a/cli/src/commands/compatibility.rs b/cli/src/commands/compatibility.rs
index 2e0c66dfbd..3b0e2cdd44 100644
--- a/cli/src/commands/compatibility.rs
+++ b/cli/src/commands/compatibility.rs
@@ -3,12 +3,12 @@
 // see LICENSE for license details.
 
 use clap::Parser as ClapParser;
+use codec::Decode;
 use color_eyre::eyre::{self, WrapErr};
 use frame_metadata::{
     v15::RuntimeMetadataV15, RuntimeMetadata, RuntimeMetadataPrefixed, META_RESERVED,
 };
 use jsonrpsee::client_transport::ws::Uri;
-use scale::Decode;
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use subxt_metadata::{get_metadata_hash, get_pallet_hash, metadata_v14_to_latest};
diff --git a/cli/src/commands/metadata.rs b/cli/src/commands/metadata.rs
index 7b987edc74..00537778af 100644
--- a/cli/src/commands/metadata.rs
+++ b/cli/src/commands/metadata.rs
@@ -4,9 +4,9 @@
 
 use crate::utils::FileOrUrl;
 use clap::Parser as ClapParser;
+use codec::{Decode, Encode};
 use color_eyre::eyre;
 use frame_metadata::{RuntimeMetadata, RuntimeMetadataPrefixed};
-use scale::{Decode, Encode};
 use std::io::{self, Write};
 use subxt_metadata::{metadata_v14_to_latest, retain_metadata_pallets};
 
diff --git a/codegen/Cargo.toml b/codegen/Cargo.toml
index 97a298c41e..6c776d30b0 100644
--- a/codegen/Cargo.toml
+++ b/codegen/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt-codegen"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -13,21 +13,21 @@ homepage.workspace = true
 description = "Generate an API for interacting with a substrate node from FRAME metadata"
 
 [dependencies]
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full"] }
-darling = "0.14.4"
-frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
-heck = "0.4.1"
-proc-macro2 = "1.0.55"
-quote = "1.0.8"
-syn = "1.0.109"
-scale-info = "2.5.0"
-subxt-metadata = { version = "0.28.0", path = "../metadata" }
-jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport", "http-client"] }
-hex = "0.4.3"
-tokio = { version = "1.27", features = ["macros", "rt-multi-thread"] }
-thiserror = "1.0.40"
+codec = { package = "parity-scale-codec", workspace = true, features = ["derive"] }
+darling = { workspace = true }
+frame-metadata = { workspace = true }
+heck = { workspace = true }
+proc-macro2 = { workspace = true }
+quote = { workspace = true }
+syn = { workspace = true }
+scale-info = { workspace = true }
+subxt-metadata = { workspace = true }
+jsonrpsee = { workspace = true, features = ["async-client", "client-ws-transport", "http-client"] }
+hex = { workspace = true }
+tokio = { workspace = true }
+thiserror = { workspace = true }
 
 [dev-dependencies]
-bitvec = { version = "1.0.0", default-features = false, features = ["alloc"] }
-scale-info = { version = "2.5.0", features = ["bit-vec"] }
-pretty_assertions = "1.0.0"
+bitvec = { workspace = true }
+scale-info = { workspace = true, features = ["bit-vec"] }
+pretty_assertions = { workspace = true }
diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index 928b6ae152..2b28de852b 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt-examples"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -13,12 +13,12 @@ homepage.workspace = true
 description = "Subxt example usage"
 
 [dev-dependencies]
-subxt = { path = "../subxt" }
-tokio = { version = "1.27", features = ["rt-multi-thread", "macros", "time"] }
-futures = "0.3.27"
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full", "bit-vec"] }
-hex = "0.4.3"
-tracing-subscriber = "0.3.17"
-sp-keyring = "23.0.0"
-sp-core = { version = "20.0.0", default-features = false }
-sp-runtime = "23.0.0"
+subxt = { workspace = true }
+tokio = { workspace = true }
+futures = { workspace = true }
+codec = { package = "parity-scale-codec", workspace = true, features = ["derive", "bit-vec"] }
+hex = { workspace = true }
+sp-keyring = { workspace = true }
+sp-core = { workspace = true }
+sp-runtime = { workspace = true }
+tracing-subscriber = { workspace = true }
diff --git a/macro/Cargo.toml b/macro/Cargo.toml
index 6a3c8c3e54..eeafea2872 100644
--- a/macro/Cargo.toml
+++ b/macro/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt-macro"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -17,8 +17,7 @@ description = "Generate types and helpers for interacting with Substrate runtime
 proc-macro = true
 
 [dependencies]
-darling = "0.14.4"
-proc-macro-error = "1.0.4"
-syn = "1.0.109"
-
-subxt-codegen = { path = "../codegen", version = "0.28.0" }
+darling = { workspace = true }
+proc-macro-error = { workspace = true }
+syn = { workspace = true }
+subxt-codegen = { workspace = true }
diff --git a/metadata/Cargo.toml b/metadata/Cargo.toml
index d72d8fa6db..59f144a83d 100644
--- a/metadata/Cargo.toml
+++ b/metadata/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt-metadata"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -14,15 +14,15 @@ homepage.workspace = true
 description = "Command line utilities for checking metadata compatibility between nodes."
 
 [dependencies]
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full"] }
+codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive"] }
 frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
 scale-info = "2.5.0"
 sp-core-hashing = "8.0.0"
 
 [dev-dependencies]
-bitvec = { version = "1.0.0", default-features = false, features = ["alloc"] }
-criterion = "0.4"
-scale-info = { version = "2.5.0", features = ["bit-vec"] }
+bitvec = { workspace = true, features = ["alloc"] }
+criterion = { workspace = true }
+scale-info = { workspace = true, features = ["bit-vec"] }
 
 [lib]
 # Without this, libtest cli opts interfere with criteron benches:
diff --git a/subxt/Cargo.toml b/subxt/Cargo.toml
index a3a04600ae..c9dc8061ed 100644
--- a/subxt/Cargo.toml
+++ b/subxt/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "subxt"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -35,49 +35,52 @@ jsonrpsee-ws = ["jsonrpsee/async-client", "jsonrpsee/client-ws-transport"]
 jsonrpsee-web = ["jsonrpsee/async-wasm-client", "jsonrpsee/client-web-transport"]
 
 [dependencies]
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full"] }
-scale-info = "2.5.0"
-scale-value = "0.7.0"
-scale-bits = "0.3"
-scale-decode = "0.5.0"
-scale-encode = "0.1.0"
-futures = { version = "0.3.27", default-features = false, features = ["std"] }
-hex = "0.4.3"
-jsonrpsee = { version = "0.16", optional = true, features = ["jsonrpsee-types"] }
-serde = { version = "1.0.159", features = ["derive"] }
-serde_json = { version = "1.0.96", features = ["raw_value"] }
-thiserror = "1.0.40"
-tracing = "0.1.34"
-parking_lot = "0.12.0"
-frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
-derivative = "2.2.0"
-either = "1.8.1"
-
-subxt-macro = { version = "0.28.0", path = "../macro" }
-subxt-metadata = { version = "0.28.0", path = "../metadata" }
+codec = { package = "parity-scale-codec", workspace = true, features = ["derive"] }
+scale-info = { workspace = true }
+scale-value = { workspace = true }
+scale-bits = { workspace = true }
+scale-decode = { workspace = true }
+scale-encode = { workspace = true }
+futures = { workspace = true }
+hex = { workspace = true }
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true, features = ["raw_value"] }
+thiserror = { workspace = true }
+tracing = { workspace = true }
+parking_lot = { workspace = true }
+frame-metadata = { workspace = true }
+derivative = { workspace = true }
+either = { workspace = true }
 
 # Provides some deserialization, types like U256/H256 and hashing impls like twox/blake256:
-impl-serde = { version = "0.4.0" }
-primitive-types = { version = "0.12.1", default-features = false, features = ["codec", "scale-info", "serde"] }
-sp-core-hashing = "8.0.0"
+impl-serde = { workspace = true }
+primitive-types = { workspace = true }
+sp-core-hashing = { workspace = true }
 
 # For ss58 encoding AccountId32 to serialize them properly:
-base58 = { version = "0.2.0" }
-blake2 = { version = "0.10.4", default-features = false }
+base58 = { workspace = true }
+blake2 = { workspace = true }
+
+# Included if one of the jsonrpsee features is enabled.
+jsonrpsee = { workspace = true, optional = true, features = ["jsonrpsee-types"] }
 
 # These are only included is "substrate-compat" is enabled.
-sp-core = { version = "20.0.0", default-features = false, optional = true }
-sp-runtime = { version = "23.0.0", optional = true }
+sp-core = { workspace = true, optional = true }
+sp-runtime = { workspace = true, optional = true }
+
+# Other subxt crates we depend on.
+subxt-macro = { workspace = true }
+subxt-metadata = { workspace = true }
 
 [target.wasm32-unknown-unknown.dependencies]
-getrandom = { version = "0.2", features = ["js"] }
+getrandom = { workspace = true, features = ["js"] }
 
 [dev-dependencies]
-bitvec = "1"
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full", "bit-vec"] }
-scale-info = { version = "2.5.0", features = ["bit-vec"] }
-tokio = { version = "1.27", features = ["macros", "time", "rt-multi-thread"] }
-sp-core = { version = "20.0.0", default-features = false }
-sp-runtime = "23.0.0"
-sp-keyring = "23.0.0"
-sp-version = "21.0.0"
+bitvec = { workspace = true }
+codec = { workspace = true, features = ["derive", "bit-vec"] }
+scale-info = { workspace = true, features = ["bit-vec"] }
+tokio = { workspace = true, features = ["macros", "time", "rt-multi-thread"] }
+sp-core = { workspace = true }
+sp-runtime = { workspace = true }
+sp-keyring = { workspace = true }
+sp-version = { workspace = true }
diff --git a/testing/integration-tests/Cargo.toml b/testing/integration-tests/Cargo.toml
index a4e48cd696..980301a32f 100644
--- a/testing/integration-tests/Cargo.toml
+++ b/testing/integration-tests/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "integration-tests"
-version = "0.28.0"
+version.workspace = true
 authors.workspace = true
 edition.workspace = true
 rust-version.workspace = true
@@ -16,24 +16,24 @@ description = "Subxt integration tests that rely on the Substrate binary"
 default = ["subxt/integration-tests"]
 
 [dev-dependencies]
-assert_matches = "1.5.0"
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full", "bit-vec"] }
-frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
-futures = "0.3.27"
-hex = "0.4.3"
-regex = "1.8.1"
-scale-info = { version = "2.5.0", features = ["bit-vec"] }
-sp-core = { version = "20.0.0", default-features = false }
-sp-runtime = "23.0.0"
-sp-keyring = "23.0.0"
-syn = "1.0.109"
-subxt = { version = "0.28.0", path = "../../subxt" }
-subxt-codegen = { version = "0.28.0", path = "../../codegen" }
-subxt-metadata = { version = "0.28.0", path = "../../metadata" }
-test-runtime = { path = "../test-runtime" }
-tokio = { version = "1.27", features = ["macros", "time"] }
-tracing = "0.1.34"
-tracing-subscriber = "0.3.17"
-wabt = "0.10.0"
-which = "4.4.0"
-substrate-runner = { path = "../substrate-runner" }
+assert_matches = { workspace = true }
+codec = { package = "parity-scale-codec", workspace = true, features = ["derive", "bit-vec"] }
+frame-metadata = { workspace = true }
+futures = { workspace = true }
+hex = { workspace = true }
+regex = { workspace = true }
+scale-info = { workspace = true, features = ["bit-vec"] }
+sp-core = { workspace = true }
+sp-runtime = { workspace = true }
+sp-keyring = { workspace = true }
+syn = { workspace = true }
+subxt = { workspace = true }
+subxt-codegen = { workspace = true }
+subxt-metadata = { workspace = true }
+test-runtime = { workspace = true }
+tokio = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+wabt = { workspace = true }
+which = { workspace = true }
+substrate-runner = { workspace = true }
diff --git a/testing/substrate-runner/Cargo.toml b/testing/substrate-runner/Cargo.toml
index d1e8ab794e..6642ad5b20 100644
--- a/testing/substrate-runner/Cargo.toml
+++ b/testing/substrate-runner/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "substrate-runner"
-version = "0.28.0"
+version.workspace = true
 edition = "2021"
 publish = false
 
diff --git a/testing/test-runtime/Cargo.toml b/testing/test-runtime/Cargo.toml
index 652a76e9cb..4236ef57aa 100644
--- a/testing/test-runtime/Cargo.toml
+++ b/testing/test-runtime/Cargo.toml
@@ -1,16 +1,16 @@
 [package]
 name = "test-runtime"
-version = "0.28.0"
+version.workspace = true
 edition = "2021"
 publish = false
 
 [dependencies]
-subxt = { path = "../../subxt" }
+subxt = { workspace = true }
 
 [build-dependencies]
-substrate-runner = { path = "../substrate-runner" }
-impl-serde = "0.4.0"
-serde = "1.0.160"
-tokio = { version = "1.27", features = ["macros", "rt-multi-thread"] }
-which = "4.4.0"
-jsonrpsee = { version = "0.16.0", features = ["async-client", "client-ws-transport"] }
+substrate-runner = { workspace = true }
+impl-serde = { workspace = true }
+serde = { workspace = true }
+tokio = { workspace = true }
+which = { workspace = true }
+jsonrpsee = { workspace = true, features = ["async-client", "client-ws-transport"] }
diff --git a/testing/ui-tests/Cargo.toml b/testing/ui-tests/Cargo.toml
index 200d45aa98..a56bf30d0d 100644
--- a/testing/ui-tests/Cargo.toml
+++ b/testing/ui-tests/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ui-tests"
-version = "0.28.0"
+version.workspace = true
 edition = "2021"
 publish = false
 
@@ -9,9 +9,9 @@ publish = false
 [dependencies]
 
 [dev-dependencies]
-trybuild = "1.0.79"
-scale-info = { version = "2.5.0", features = ["bit-vec"] }
-frame-metadata = { version = "15.1.0", features = ["v14", "v15-unstable", "std"] }
-codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full", "bit-vec"] }
-subxt = { path = "../../subxt" }
-subxt-metadata = { path = "../../metadata" }
+trybuild = { workspace = true }
+scale-info = { workspace = true, features = ["bit-vec"] }
+frame-metadata ={ workspace = true }
+codec = { package = "parity-scale-codec", workspace = true, features = ["derive", "bit-vec"] }
+subxt = { workspace = true }
+subxt-metadata = { workspace = true }
diff --git a/testing/wasm-tests/.gitignore b/testing/wasm-tests/.gitignore
new file mode 100644
index 0000000000..c41cc9e35e
--- /dev/null
+++ b/testing/wasm-tests/.gitignore
@@ -0,0 +1 @@
+/target
\ No newline at end of file
diff --git a/testing/wasm-tests/Cargo.lock b/testing/wasm-tests/Cargo.lock
new file mode 100644
index 0000000000..963f09b9e7
--- /dev/null
+++ b/testing/wasm-tests/Cargo.lock
@@ -0,0 +1,2028 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "anyhow"
+version = "1.0.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7de8ce5e0f9f8d88245311066a578d72b7af3e7088f32783804676302df237e4"
+
+[[package]]
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+checksum = "6b4930d2cb77ce62f89ee5d5289b4ac049559b1c45539271f5ed4fdc7db34545"
+
+[[package]]
+name = "arrayvec"
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+checksum = "8da52d66c7071e2e3fa2a1e5c6d088fec47b593032b254f5e980de8ea54454d6"
+
+[[package]]
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+ "event-listener",
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+
+[[package]]
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+ "syn 2.0.15",
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+[[package]]
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+[[package]]
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+[[package]]
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diff --git a/testing/wasm-tests/Cargo.toml b/testing/wasm-tests/Cargo.toml
index 48c60ec44c..ac1a04d963 100644
--- a/testing/wasm-tests/Cargo.toml
+++ b/testing/wasm-tests/Cargo.toml
@@ -5,8 +5,11 @@ edition = "2021"
 publish = false
 
 [dev-dependencies]
+# This crate is not a part of the workspace, sadly, because it
+# requires a mutually exclusive jsonrpsee feature to be enabled on
+# subxt to work. So, we can't inherit versions.
 wasm-bindgen-test = "0.3.24"
 tracing-wasm = "0.2.1"
 console_error_panic_hook = "0.1.7"
-serde_json = "1.0.57"
+serde_json = "1"
 subxt = { path = "../../subxt", default-features = false, features = ["jsonrpsee-web"] }
diff --git a/testing/wasm-tests/tests/wasm.rs b/testing/wasm-tests/tests/wasm.rs
index eed10af565..ccfac7e763 100644
--- a/testing/wasm-tests/tests/wasm.rs
+++ b/testing/wasm-tests/tests/wasm.rs
@@ -9,10 +9,9 @@ wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);
 
 #[wasm_bindgen_test]
 async fn wasm_ws_transport_works() {
-    let client =
-        subxt::client::OnlineClient::<PolkadotConfig>::from_url("ws://127.0.0.1:9944")
-            .await
-            .unwrap();
+    let client = subxt::client::OnlineClient::<PolkadotConfig>::from_url("ws://127.0.0.1:9944")
+        .await
+        .unwrap();
 
     let chain = client.rpc().system_chain().await.unwrap();
     assert_eq!(&chain, "Development");