diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 711f7d2fb30e..1c95caa8f041 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" "1.43.0"
-      "sha256-pY3ia1wTvlTeqzFyPumreqqSK+HfvQk9w6TKEsyFMVc=";
+    buildMypyBoto3Package "lambda" "1.43.20"
+      "sha256-wdYorfSAmlDVEFRlQxiujWu/OFbq6nKA2aZt1mv/isk=";
 
   mypy-boto3-lex-models =
     buildMypyBoto3Package "lex-models" "1.43.3"