diff --git a/pkgs/development/python-modules/iometer/default.nix b/pkgs/development/python-modules/iometer/default.nix
index a8572074f6f1..932fe4fc0e8d 100644
--- a/pkgs/development/python-modules/iometer/default.nix
+++ b/pkgs/development/python-modules/iometer/default.nix
@@ -1,5 +1,6 @@
 {
   aiohttp,
+  aiohttp-sse-client,
   aioresponses,
   buildPythonPackage,
   fetchFromGitHub,
@@ -10,22 +11,23 @@
   yarl,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "iometer";
-  version = "0.4.0";
+  version = "1.0.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "iometer-gmbh";
     repo = "iometer.py";
-    tag = "v${version}";
-    hash = "sha256-FO9IwBXGIBh522JaaATjxo93zbGwnB+Y9dy7724d1Rw=";
+    tag = finalAttrs.version;
+    hash = "sha256-ksf/nZHv4/JRHo5OrFp6lgPF62DD37ELFfUVkL+TDEo=";
   };
 
   build-system = [ poetry-core ];
 
   dependencies = [
     aiohttp
+    aiohttp-sse-client
     yarl
   ];
 
@@ -42,10 +44,10 @@ buildPythonPackage rec {
   ];
 
   meta = {
-    changelog = "https://github.com/iometer-gmbh/iometer.py/releases/tag/${src.tag}";
+    changelog = "https://github.com/iometer-gmbh/iometer.py/releases/tag/${finalAttrs.src.tag}";
     description = "Python client for interacting with IOmeter devices over HTTP";
     homepage = "https://github.com/iometer-gmbh/iometer.py";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ dotlambda ];
   };
-}
+})