diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index e84ba439dcd3..cd57b39595b6 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -207,8 +207,8 @@ in
       "sha256-Yj+PL5SHeMuiC3kougQa6zahznlD32+1NQWqoD8xdEg=";
 
   mypy-boto3-cleanrooms =
-    buildMypyBoto3Package "cleanrooms" "1.42.20"
-      "sha256-Psj4WK99bI+zQBUCmUgiL1zl7i/f76Ieu0QxIfGUfvA=";
+    buildMypyBoto3Package "cleanrooms" "1.42.29"
+      "sha256-UaGUvnJYw/bCJzIU9exO/eW2cvnUuiDGheFO6Zj3Uoo=";
 
   mypy-boto3-cloud9 =
     buildMypyBoto3Package "cloud9" "1.42.3"