diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index d39b1d63dd10..371818f636ce 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -211,8 +211,8 @@ in
       "sha256-m7y4NwYn4tNtJ2V8wlXSkOMdhTrNFZUWXc8g1yqLFGA=";
 
   mypy-boto3-cloud9 =
-    buildMypyBoto3Package "cloud9" "1.43.0"
-      "sha256-76N3xUFKaU+cepHviRw2SWdjptNmVZkg6giAF7B1b5s=";
+    buildMypyBoto3Package "cloud9" "1.43.39"
+      "sha256-n+O246n0LbH1Tc8QK93YRO2Cxj9pz8nfAetvq1lidj8=";
 
   mypy-boto3-cloudcontrol =
     buildMypyBoto3Package "cloudcontrol" "1.43.0"