diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index b92b558c588c..b903d3033864 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -130,8 +130,8 @@ rec {
       "sha256-xrpy1Eq+Kleg0oYEQY/UDXvUUdZp9B6rz4OrXo/A9bA=";
 
   mypy-boto3-appstream =
-    buildMypyBoto3Package "appstream" "1.40.0"
-      "sha256-TuIQx9qeu+JL1+Y3Gp83J4am1IYua7Ps40mqN8YLln8=";
+    buildMypyBoto3Package "appstream" "1.40.4"
+      "sha256-AgYaQp4AQUly5DO83NgCojU7cKOP5LdStYr1X3lMAE0=";
 
   mypy-boto3-appsync =
     buildMypyBoto3Package "appsync" "1.40.0"