diff --git a/Cargo.toml b/Cargo.toml
index bf69b49..b4a02ed 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,7 @@ license = "MIT"
 name = "webidl"
 readme = "README.md"
 repository = "https://github.com/sgodwincs/webidl-rs"
-version = "0.4.1"
+version = "0.5.0"
 exclude = ["tests/*.zip", "src/parser/grammar.rs"]
 
 [build-dependencies]
diff --git a/RELEASES.md b/RELEASES.md
new file mode 100644
index 0000000..84cc45f
--- /dev/null
+++ b/RELEASES.md
@@ -0,0 +1,3 @@
+# 0.5.0
+
+ - Reduced package size by excluding `mozilla_webidls.zip` and upgrading `lalrpop` to `0.14.0` ([#12](https://github.com/sgodwincs/webidl-rs/pull/12))