diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 084e3d20b2bb..db9d0e950bd6 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -210,8 +210,8 @@ rec {
       "sha256-axa2niA9HlLpV9Tf01p0fG2GhK2lNlCM/O8LLPHQVRc=";
 
   mypy-boto3-cleanrooms =
-    buildMypyBoto3Package "cleanrooms" "1.40.37"
-      "sha256-Uam/iXnOhYGUwZVRpyv61asq1dJkKO2Hoce3sIMm3Zo=";
+    buildMypyBoto3Package "cleanrooms" "1.40.43"
+      "sha256-EDO9P8qznO0SjRmT602UX/FpSUcLNdGnb5kGd8NTc1Q=";
 
   mypy-boto3-cloud9 =
     buildMypyBoto3Package "cloud9" "1.40.20"