diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index b94b41983660..bc65e270c7e8 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -1085,8 +1085,8 @@ in
       "sha256-55wnvv8vd/G5KdZoJipaSLzC13wRoop7ZXwTLDU4GtE=";
 
   mypy-boto3-rds =
-    buildMypyBoto3Package "rds" "1.42.1"
-      "sha256-zyPlxOqUJYdMlV2Z+katL9RPNJUK9vUJFwe1dk+kR6Q=";
+    buildMypyBoto3Package "rds" "1.42.3"
+      "sha256-ZW6Vwwe4LP+S1uznIqo5YOqC8zBT4EOqC7eSlgmENjY=";
 
   mypy-boto3-rds-data =
     buildMypyBoto3Package "rds-data" "1.41.0"