diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index 2cf9e5c091f6..43ce326e89c3 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -942,8 +942,8 @@ rec {
       "sha256-2hV5TYKrrowbOqQZiw0DphDW2d2lFo8PYGolyqewznw=";
 
   mypy-boto3-neptune =
-    buildMypyBoto3Package "neptune" "1.38.0"
-      "sha256-dXEMhPcqBlAz7+wy59JOS5x5Hy1PobC3McunN/2oabQ=";
+    buildMypyBoto3Package "neptune" "1.38.18"
+      "sha256-5rStsb6FVG4I/4n3y4phDxUbfh9HTmOinaW/BQikp1Q=";
 
   mypy-boto3-neptunedata =
     buildMypyBoto3Package "neptunedata" "1.38.0"