diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index f2b11a5909b5..0fab1d0a5987 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -1393,8 +1393,8 @@ rec {
       "sha256-OTU77sd04w1esOd5pEN6X2faLVkJK/08J9SpURLEe1Y=";
 
   mypy-boto3-waf-regional =
-    buildMypyBoto3Package "waf-regional" "1.40.0"
-      "sha256-BCmGOUKfRbzFczLKiU5gMjnU3RALOFIHmif2peyzggY=";
+    buildMypyBoto3Package "waf-regional" "1.40.18"
+      "sha256-r1Z15ZcuHUFEr7yUhnksIfPtxMlCrCiQw4TfRFfSW/U=";
 
   mypy-boto3-wafv2 =
     buildMypyBoto3Package "wafv2" "1.40.16"