diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index d3a04d2e879f..2e9de3e1cbe8 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -94,8 +94,8 @@ in
       "sha256-n0P3k9Bs7ckTEim/cHXLQzt5qsjxzq59TYlOair61mU=";
 
   mypy-boto3-appconfigdata =
-    buildMypyBoto3Package "appconfigdata" "1.40.0"
-      "sha256-/6S/GdXeAYY9wdapWjcrCyaDmeijp6kSy63m0ITW3fs=";
+    buildMypyBoto3Package "appconfigdata" "1.40.55"
+      "sha256-Unxc01GzvKZGiKlW3o3ZrEZXthJPlMY1tu0vnUgYmq4=";
 
   mypy-boto3-appfabric =
     buildMypyBoto3Package "appfabric" "1.40.15"