diff --git a/pkgs/development/python-modules/prometheus-client/default.nix b/pkgs/development/python-modules/prometheus-client/default.nix
index 4c4c2338445a..62044eedbf80 100644
--- a/pkgs/development/python-modules/prometheus-client/default.nix
+++ b/pkgs/development/python-modules/prometheus-client/default.nix
@@ -7,7 +7,7 @@
 
 buildPythonPackage rec {
   pname = "prometheus-client";
-  version = "0.19.0";
+  version = "0.20.0";
   format = "setuptools";
 
   disabled = pythonOlder "3.6";
@@ -16,7 +16,7 @@ buildPythonPackage rec {
     owner = "prometheus";
     repo = "client_python";
     rev = "refs/tags/v${version}";
-    hash = "sha256-7mVqfzK0E8RQAlQyQD8/DIcPJZ52V13JqU22tsQJp+Q=";
+    hash = "sha256-IMw0mpOUzjXBy4bMTeSFMc5pdibI5lGxZHKiufjPLbM=";
   };
 
   __darwinAllowLocalNetworking = true;