diff --git a/Cargo.toml b/Cargo.toml
index 9378604f6..c0105c704 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,10 +5,10 @@ documentation = "https://docs.rs/num"
 homepage = "https://github.com/rust-num/num"
 keywords = ["mathematics", "numerics", "bignum"]
 categories = [ "algorithms", "data-structures", "science", "no-std" ]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-num/num"
 name = "num"
-version = "0.3.0"
+version = "0.3.1"
 readme = "README.md"
 exclude = ["/bors.toml", "/ci/*", "/.github/*"]
 edition = "2018"
@@ -23,29 +23,29 @@ travis-ci = { repository = "rust-num/num" }
 
 [dependencies.num-bigint]
 optional = true # needs std until Rust 1.36
-version = "0.3.0"
+version = "0.3.1"
 default-features = false
 
 [dependencies.num-complex]
-version = "0.3.0"
+version = "0.3.1"
 default-features = false
 
 [dependencies.num-integer]
-version = "0.1.43"
+version = "0.1.44"
 default-features = false
 features = ["i128"]
 
 [dependencies.num-iter]
-version = "0.1.41"
+version = "0.1.42"
 default-features = false
 features = ["i128"]
 
 [dependencies.num-rational]
-version = "0.3.0"
+version = "0.3.1"
 default-features = false
 
 [dependencies.num-traits]
-version = "0.2.12"
+version = "0.2.14"
 default-features = false
 features = ["i128"]
 
diff --git a/README.md b/README.md
index 13b58f889..0ba79e01a 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,21 @@ The `num` crate as a whole is tested for rustc 1.31 and greater.
 The `num-traits`, `num-integer`, and `num-iter` crates are individually tested
 for rustc 1.8 and greater, if you require such older compatibility.
 
+## License
+
+Licensed under either of
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.
+
 
 [`num-bigint`]: https://github.com/rust-num/num-bigint
 [bigint-c]: https://crates.io/crates/num-bigint
diff --git a/RELEASES.md b/RELEASES.md
index 20401decd..96dec1bee 100644
--- a/RELEASES.md
+++ b/RELEASES.md
@@ -1,3 +1,8 @@
+# Release 0.3.1 (2020-11-03)
+
+- Updated all sub-crates to their latest versions.
+- Clarify the license specification as "MIT OR Apache-2.0".
+
 # Release 0.3.0 (2020-06-13)
 
 All items exported from `num-integer`, `num-iter`, and `num-traits` are still