diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 7aea92466c45..987449393f9c 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -766,8 +766,8 @@ in
       "sha256-gYTCgaRwH3zKi6gg4MC8DUwXQT+jZO6lqc/vi+JUahU=";
 
   mypy-boto3-lambda =
-    buildMypyBoto3Package "lambda" "1.43.37"
-      "sha256-LYFV4zicevoTNNo+LrKHk2TiXyTApDG+oa7qHnNfJxw=";
+    buildMypyBoto3Package "lambda" "1.43.42"
+      "sha256-mLDdcUFNxg9ZjaL7HiGX6Dv0hEIFID8k+CLh9jq9TZs=";
 
   mypy-boto3-lex-models =
     buildMypyBoto3Package "lex-models" "1.43.3"