diff --git a/pkgs/development/python-modules/fastapi-mail/default.nix b/pkgs/development/python-modules/fastapi-mail/default.nix
index cd73682509b9..ba131039b2ad 100644
--- a/pkgs/development/python-modules/fastapi-mail/default.nix
+++ b/pkgs/development/python-modules/fastapi-mail/default.nix
@@ -22,16 +22,18 @@
 
 buildPythonPackage (finalAttrs: {
   pname = "fastapi-mail";
-  version = "1.6.3";
+  version = "1.6.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "sabuhish";
     repo = "fastapi-mail";
-    tag = "v${finalAttrs.version}";
+    tag = finalAttrs.version;
     hash = "sha256-7Of7PSfY5lFbuxqBM5IyCnOa1CwbOijruSSrRylz3S8=";
   };
 
+  pythonRelaxDeps = [ "cryptography" ];
+
   build-system = [ poetry-core ];
 
   nativeBuildInputs = [ pyprojectVersionPatchHook ];