diff --git a/pyproject.toml b/pyproject.toml
index 234615e..b740f94 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-packages = ["kopf==1.39.1"]
+packages = ["kopf==1.40.0"]
 pip-install = ["pip==25.3"]
 
 [project.urls]