diff --git a/base/Cargo.toml b/base/Cargo.toml
index 07711d3d..203f09d7 100644
--- a/base/Cargo.toml
+++ b/base/Cargo.toml
@@ -3,6 +3,7 @@ name = "libipld-base"
 version = "0.1.0"
 authors = ["David Craven <david@craven.ch>"]
 edition = "2018"
+license = "MIT OR Apache-2.0"
 
 [dependencies]
 async-trait = "0.1"
diff --git a/dag-cbor-derive/Cargo.toml b/dag-cbor-derive/Cargo.toml
index 58b8b10d..a124538d 100644
--- a/dag-cbor-derive/Cargo.toml
+++ b/dag-cbor-derive/Cargo.toml
@@ -3,6 +3,7 @@ name = "dag-cbor-derive"
 version = "0.1.0"
 authors = ["David Craven <david@craven.ch>"]
 edition = "2018"
+license = "MIT OR Apache-2.0"
 
 [lib]
 proc-macro = true
diff --git a/dag-cbor/Cargo.toml b/dag-cbor/Cargo.toml
index 01fa927b..ac32f3b5 100644
--- a/dag-cbor/Cargo.toml
+++ b/dag-cbor/Cargo.toml
@@ -3,6 +3,7 @@ name = "dag-cbor"
 version = "0.1.0"
 authors = ["David Craven <david@craven.ch>"]
 edition = "2018"
+license = "MIT OR Apache-2.0"
 
 [dependencies]
 async-std = { git = "https://github.com/dvc94ch/async-std" }
diff --git a/macro/Cargo.toml b/macro/Cargo.toml
index ac934436..493c5554 100644
--- a/macro/Cargo.toml
+++ b/macro/Cargo.toml
@@ -3,6 +3,7 @@ name = "libipld-macro"
 version = "0.1.0"
 authors = ["David Craven <david@craven.ch>"]
 edition = "2018"
+license = "MIT OR Apache-2.0"
 
 [dependencies]
 libipld-base = { path = "../base" }