diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
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+++ b/RELEASE-NOTES.md
@@ -1,5 +1,9 @@
 # Release Notes
 
+## 4.0.1
+
+* Do not panic when [the number of arguments of a function evaluated in an expression is incorect](https://code.forgejo.org/forgejo/act/pulls/59/files).
+
 ## 4.0.0
 
 * Breaking change: fix the default configuration for `docker_host` is changed to [not mounting the docker server socket](https://code.forgejo.org/forgejo/runner/pulls/305).