diff --git a/Cargo.lock b/Cargo.lock
index 92c77a63044..33ed98e5fe4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3469,7 +3469,7 @@ dependencies = [
 
 [[package]]
 name = "libp2p-webrtc-websys"
-version = "0.4.0-alpha.2"
+version = "0.4.0"
 dependencies = [
  "bytes",
  "futures",
diff --git a/Cargo.toml b/Cargo.toml
index 16885c4eded..7a512bd4009 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -108,7 +108,7 @@ libp2p-uds = { version = "0.41.0", path = "transports/uds" }
 libp2p-upnp = { version = "0.3.1", path = "protocols/upnp" }
 libp2p-webrtc = { version = "0.8.0-alpha", path = "transports/webrtc" }
 libp2p-webrtc-utils = { version = "0.3.0", path = "misc/webrtc-utils" }
-libp2p-webrtc-websys = { version = "0.4.0-alpha.2", path = "transports/webrtc-websys" }
+libp2p-webrtc-websys = { version = "0.4.0", path = "transports/webrtc-websys" }
 libp2p-websocket = { version = "0.44.1", path = "transports/websocket" }
 libp2p-websocket-websys = { version = "0.4.1", path = "transports/websocket-websys" }
 libp2p-webtransport-websys = { version = "0.4.1", path = "transports/webtransport-websys" }
diff --git a/transports/webrtc-websys/CHANGELOG.md b/transports/webrtc-websys/CHANGELOG.md
index 5b8f2efb3b0..26bd0c85254 100644
--- a/transports/webrtc-websys/CHANGELOG.md
+++ b/transports/webrtc-websys/CHANGELOG.md
@@ -1,7 +1,9 @@
-## 0.4.0-alpha.2
+## 0.4.0
 
+- Cut stable release.
+  See [PR 5807](https://github.com/libp2p/rust-libp2p/pull/5807)
 - Bump version of web-sys and update `__Nonexhaustive` to `__Invalid`.
-  See [PR 5569](https://github.com/libp2p/rust-libp2p/pull/5569) 
+  See [PR 5569](https://github.com/libp2p/rust-libp2p/pull/5569)
 
 ## 0.4.0-alpha
 
diff --git a/transports/webrtc-websys/Cargo.toml b/transports/webrtc-websys/Cargo.toml
index 6d42d74f610..47cf252393f 100644
--- a/transports/webrtc-websys/Cargo.toml
+++ b/transports/webrtc-websys/Cargo.toml
@@ -8,7 +8,7 @@ license = "MIT"
 name = "libp2p-webrtc-websys"
 repository = "https://github.com/libp2p/rust-libp2p"
 rust-version = { workspace = true }
-version = "0.4.0-alpha.2"
+version = "0.4.0"
 publish = true
 
 [dependencies]