diff --git a/pkgs/development/python-modules/mypy-boto3/default.nix b/pkgs/development/python-modules/mypy-boto3/default.nix
index c341831acab7..d2f907cb4678 100644
--- a/pkgs/development/python-modules/mypy-boto3/default.nix
+++ b/pkgs/development/python-modules/mypy-boto3/default.nix
@@ -941,8 +941,8 @@ rec {
       "sha256-w/km0Eq/rEX182tDtxVsFCm3bK2pUr1Fh6ZnsX6thAI=";
 
   mypy-boto3-neptune =
-    buildMypyBoto3Package "neptune" "1.40.22"
-      "sha256-I2YroCl0veUVR3vJ+jXN09SU4oHjhrWS3fR3ZvTV6sY=";
+    buildMypyBoto3Package "neptune" "1.40.38"
+      "sha256-3vbUWdYw7jqTM5TPM3btPROlXPW1xR+3cI29ImVrt1w=";
 
   mypy-boto3-neptunedata =
     buildMypyBoto3Package "neptunedata" "1.40.0"