diff --git a/pkgs/development/python-modules/elkm1-lib/default.nix b/pkgs/development/python-modules/elkm1-lib/default.nix
index 2abd8565ca6f..6722608ee7c1 100644
--- a/pkgs/development/python-modules/elkm1-lib/default.nix
+++ b/pkgs/development/python-modules/elkm1-lib/default.nix
@@ -1,4 +1,5 @@
 { lib
+, async-timeout
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
@@ -11,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "elkm1-lib";
-  version = "2.1.0";
+  version = "2.2.1";
   format = "pyproject";
 
   disabled = pythonOlder "3.9";
@@ -20,7 +21,7 @@ buildPythonPackage rec {
     owner = "gwww";
     repo = "elkm1";
     rev = "refs/tags/${version}";
-    hash = "sha256-uc+hU4RyF6IXUbdpZHozbF6vO2NE2hrfgxAnmmB27lw=";
+    hash = "sha256-UrdnEafmzO/l1kTcGmPWhujbThVWv4uBH57D2uZB/kw=";
   };
 
   nativeBuildInputs = [
@@ -28,6 +29,7 @@ buildPythonPackage rec {
   ];
 
   propagatedBuildInputs = [
+    async-timeout
     pyserial-asyncio
   ];