diff --git a/pkgs/development/python-modules/urllib3/default.nix b/pkgs/development/python-modules/urllib3/default.nix
index 10021e14f12..6f8563ff155 100644
--- a/pkgs/development/python-modules/urllib3/default.nix
+++ b/pkgs/development/python-modules/urllib3/default.nix
@@ -4,12 +4,12 @@
 
 buildPythonPackage rec {
   pname = "urllib3";
-  version = "1.22";
+  version = "1.23";
   name = "${pname}-${version}";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0kyvc9zdlxr5r96bng5rhm9a6sfqidrbvvkz64s76qs5267dli6c";
+    sha256 = "a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf";
   };
 
   NOSE_EXCLUDE = stdenv.lib.concatStringsSep "," [