diff --git a/pkgs/development/python-modules/aiortm/default.nix b/pkgs/development/python-modules/aiortm/default.nix
index 93b345d89a1d..204fedd129c2 100644
--- a/pkgs/development/python-modules/aiortm/default.nix
+++ b/pkgs/development/python-modules/aiortm/default.nix
@@ -2,10 +2,12 @@
 , aiohttp
 , aioresponses
 , buildPythonPackage
+, ciso8601
 , click
 , fetchFromGitHub
-, pydantic
+, mashumaro
 , poetry-core
+, pytest-asyncio
 , pytestCheckHook
 , pythonOlder
 , yarl
@@ -13,39 +15,41 @@
 
 buildPythonPackage rec {
   pname = "aiortm";
-  version = "0.6.4";
-  format = "pyproject";
+  version = "0.8.5";
+  pyproject = true;
 
   disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "MartinHjelmare";
-    repo = pname;
+    repo = "aiortm";
     rev = "refs/tags/v${version}";
-    hash = "sha256-PFZ8B2Wtjg3xUFYcnthTW5QXLk//lFH25jwpF7hygxQ=";
+    hash = "sha256-qFjMNU/sUFtCzBNG7vauz2p1BSr9ra81kyUtaz5vSTg=";
   };
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace " --cov=aiortm --cov-report=term-missing:skip-covered" ""
+  '';
+
   nativeBuildInputs = [
     poetry-core
   ];
 
   propagatedBuildInputs = [
     aiohttp
+    ciso8601
     click
-    pydantic
+    mashumaro
     yarl
   ];
 
   nativeCheckInputs = [
     aioresponses
+    pytest-asyncio
     pytestCheckHook
   ];
 
-  postPatch = ''
-    substituteInPlace pyproject.toml \
-      --replace " --cov=aiortm --cov-report=term-missing:skip-covered" ""
-  '';
-
   pythonImportsCheck = [
     "aiortm"
   ];