diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 83d0875..830523a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,9 +46,9 @@ jobs:
             features: git
           - toolchain: stable
             features: vendored
-          - toolchain: 1.64.0 # no-std MSRV
+          - toolchain: 1.64.0 # MSRV no-std
             features: no-std
-          - toolchain: 1.58.0 # MSRV
+          - toolchain: 1.64.0 # MSRV
           - toolchain: nightly
           - toolchain: nightly
             features: no-std
diff --git a/NEWS.md b/NEWS.md
index 6974e5d..32305f1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+## 0.11.0 Not Yet Released
+
+- Bump MSRV to 1.64.0 for both std and no-std builds
+
 ## 0.10.7 2023-10-05
 
 - Fix a bug which prevented compilation on systems where C chars
diff --git a/README.md b/README.md
index 961ae8f..ad81be7 100644
--- a/README.md
+++ b/README.md
@@ -18,14 +18,14 @@ PRs and comments/issues happily accepted.
 MSRV
 -----
 
-The Minimum Supported Rust Version of this crate is Rust 1.58.0,
-*unless* you enable support for `no_std` builds, in which case Rust
-1.64.0 is required.
+The Minimum Supported Rust Version of this crate is Rust 1.64.0.
 
 Botan Versions Supported
 --------------------------
 
-This crate requires Botan 2.13.0 or higher.
+This crate requires Botan 2.13.0 or higher. However the latest
+available version of Botan3 is highly recomended for best security and
+performance.
 
 Features
 ---------
diff --git a/botan-src/Cargo.toml b/botan-src/Cargo.toml
index b7c4ac1..e0c525a 100644
--- a/botan-src/Cargo.toml
+++ b/botan-src/Cargo.toml
@@ -9,6 +9,8 @@ homepage = "https://botan.randombit.net/"
 repository = "https://github.com/randombit/botan-rs"
 readme = "README.md"
 categories = ["cryptography"]
+rust-version = "1.64"
+
 exclude = ["botan/doc",
            "botan/src/cli",
            "botan/src/lib/compat/sodium",
diff --git a/botan-sys/Cargo.toml b/botan-sys/Cargo.toml
index b9bdf64..62370ab 100644
--- a/botan-sys/Cargo.toml
+++ b/botan-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "botan-sys"
-version = "0.10.5"
+version = "0.11.0"
 authors = ["Jack Lloyd <jack@randombit.net>"]
 links = "botan-2"
 build = "build.rs"
@@ -12,11 +12,10 @@ documentation = "https://docs.rs/botan-sys"
 readme = "README.md"
 categories = [ "cryptography", "external-ffi-bindings", "no-std" ]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.64"
 
 [features]
 default = []
-no-std = []
 vendored = ["botan-src", "botan3"]
 botan3 = []
 
diff --git a/botan-sys/src/lib.rs b/botan-sys/src/lib.rs
index bd12f8b..19b2e20 100644
--- a/botan-sys/src/lib.rs
+++ b/botan-sys/src/lib.rs
@@ -1,5 +1,5 @@
+#![no_std]
 #![allow(non_camel_case_types)]
-#![cfg_attr(feature = "no-std", no_std)]
 
 mod block;
 mod cipher;
@@ -21,12 +21,8 @@ mod x509;
 mod zfec;
 
 pub mod ffi_types {
-    #[cfg(feature = "no-std")]
     pub use core::ffi::{c_char, c_int, c_uint, c_void};
 
-    #[cfg(not(feature = "no-std"))]
-    pub use std::os::raw::{c_char, c_int, c_uint, c_void};
-
     #[cfg(feature = "botan3")]
     pub type botan_view_ctx = *mut c_void;
 
diff --git a/botan/Cargo.toml b/botan/Cargo.toml
index 8f3e7e6..0252480 100644
--- a/botan/Cargo.toml
+++ b/botan/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "botan"
-version = "0.10.7"
+version = "0.11.0"
 authors = ["Jack Lloyd <jack@randombit.net>"]
 description = "Rust wrapper for Botan cryptography library"
 license = "MIT"
@@ -11,10 +11,10 @@ keywords = [ "crypto" ]
 readme = "../README.md"
 categories = [ "cryptography", "api-bindings", "no-std" ]
 edition = "2021"
-rust-version = "1.58"
+rust-version = "1.64"
 
 [dependencies]
-botan-sys = { version = "0.10.5", path = "../botan-sys" }
+botan-sys = { version = "0.11", path = "../botan-sys" }
 
 [dev-dependencies]
 wycheproof = "0.5"
@@ -22,6 +22,6 @@ hex = "0.4"
 
 [features]
 default = []
-no-std = ["botan-sys/no-std"]
+no-std = []
 vendored = ["botan-sys/vendored"]
 botan3 = ["botan-sys/botan3"]