diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index cb5c167b2f4e..a022eab3b579 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -54,8 +54,8 @@ rec {
       "sha256-AhlWp1yfbKoNGuv687k+0L8glPwFG9Nbz8Miup2pVpY=";
 
   mypy-boto3-acm =
-    buildMypyBoto3Package "acm" "1.38.0"
-      "sha256-+ay1he8tFi3GdfDMPYbiY8KMWC6CXmPQRW56VHLze+s=";
+    buildMypyBoto3Package "acm" "1.38.4"
+      "sha256-LD7/EfcMa6UBmz8Hu4Ykp80FcOdwliCd/0Z09THI2KU=";
 
   mypy-boto3-acm-pca =
     buildMypyBoto3Package "acm-pca" "1.38.0"