diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index c7c4a695d03b..0258f5293913 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -110,8 +110,8 @@ rec {
       "sha256-5AFYyCJk6eHKDaqBSl8Po/jj6Fkwr5JYgMtxGrdWGRQ=";
 
   mypy-boto3-application-autoscaling =
-    buildMypyBoto3Package "application-autoscaling" "1.38.0"
-      "sha256-lN2dqLobOiGThkSnm3W+2HRJfBYJNe9GyaI8sYA4cRk=";
+    buildMypyBoto3Package "application-autoscaling" "1.38.21"
+      "sha256-UKN0UDZcBvmZ/9nSpcy4IOxIkL1PvOmC2w5bZpvk+L0=";
 
   mypy-boto3-application-insights =
     buildMypyBoto3Package "application-insights" "1.38.0"