diff --git a/changelogs/4.0.md b/changelogs/4.0.md
index 091c4555e..6534ab821 100644
--- a/changelogs/4.0.md
+++ b/changelogs/4.0.md
@@ -780,6 +780,12 @@ However, if we add `src-namespace-prefix: pmmp\TesterPlugin` to the `plugin.yml`
   - `mcpe\RakLibInterface` -> `mcpe\raklib\RakLibInterface`
 - The following classes have been removed:
   - `mcpe\PlayerNetworkSessionAdapter`
+- The following methods have been renamed:
+  - `UPnP::PortForward()` -> `UPnP::portForward()`
+  - `UPnP::RemovePortForward()` -> `UPnP::removePortForward()`
+- The following methods have changed signatures:
+  - `UPnP::portForward()` now accepts `string $serviceURL, string $internalIP, int $internalPort, int $externalPort`.
+  - `UPnP::removePortForward()` now accepts `string $serviceURL, int $externalPort`.
 - The following methods have been removed:
   - `NetworkInterface->putPacket()`
   - `NetworkInterface->close()`