diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index c86b1b3362b2..db5c71393d62 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -407,8 +407,8 @@ in
       "sha256-rZxsnERZZWod9U+7IyPVFYSncmbpNwtzoGQopSkb9sk=";
 
   mypy-boto3-dlm =
-    buildMypyBoto3Package "dlm" "1.42.3"
-      "sha256-oqmjFYk0Wfo+PF2ho1+noYSXlpivcwLCoLL66d052Q0=";
+    buildMypyBoto3Package "dlm" "1.42.84"
+      "sha256-2oHpWP361CWG0XoAaiy5hxKAK9PBBdbyRNiDjLJ6/6U=";
 
   mypy-boto3-dms =
     buildMypyBoto3Package "dms" "1.42.80"