diff --git a/proxy/CHANGELOG.md b/proxy/CHANGELOG.md
index 43a3ccd..a893a6a 100644
--- a/proxy/CHANGELOG.md
+++ b/proxy/CHANGELOG.md
@@ -1,3 +1,7 @@
+# v0.4.0
+
+* Pin the protocol crate version for stability.
+
 # v0.3.0
 
 * The new `--v1-fallback` flag allows a proxy connection to fallback to the V1 protocol if a remote doesn't support V2.
diff --git a/proxy/Cargo.toml b/proxy/Cargo.toml
index d04c0b0..d6b825a 100644
--- a/proxy/Cargo.toml
+++ b/proxy/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bip324-proxy"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 license-file = "LICENSE"
 description = "BIP324 proxy enabling v1-only clients to use the v2 Bitcoin P2P Protocol"