diff --git a/pkgs/development/python-modules/ttp-templates/default.nix b/pkgs/development/python-modules/ttp-templates/default.nix
index c0eef67aa1a9..f6818c7e6a73 100644
--- a/pkgs/development/python-modules/ttp-templates/default.nix
+++ b/pkgs/development/python-modules/ttp-templates/default.nix
@@ -3,22 +3,25 @@
   buildPythonPackage,
   fetchFromGitHub,
   poetry-core,
+  pydantic,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "ttp-templates";
-  version = "0.5.1";
+  version = "0.5.8";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "dmulyalin";
     repo = "ttp_templates";
-    tag = version;
-    hash = "sha256-lGlg8AgP7VtwZm5xfpEzs1VJSbfBdYns/l4ROP0LtEQ=";
+    tag = finalAttrs.version;
+    hash = "sha256-W6F0/CGm713HhCtgqv+tEDm5mlkx0JJRmnUc9j+Fnvs=";
   };
 
   nativeBuildInputs = [ poetry-core ];
 
+  dependencies = [ pydantic ];
+
   postPatch = ''
     # Drop circular dependency on ttp
     sed -i '/ttp =/d' pyproject.toml
@@ -30,8 +33,8 @@ buildPythonPackage rec {
   meta = {
     description = "Template Text Parser Templates collections";
     homepage = "https://github.com/dmulyalin/ttp_templates";
-    changelog = "https://github.com/dmulyalin/ttp_templates/releases/tag/${version}";
+    changelog = "https://github.com/dmulyalin/ttp_templates/releases/tag/${finalAttrs.src.tag}";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})