diff --git a/pkgs/development/python-modules/urllib3/default.nix b/pkgs/development/python-modules/urllib3/default.nix
index e50d90266bf..57d5c160ef0 100644
--- a/pkgs/development/python-modules/urllib3/default.nix
+++ b/pkgs/development/python-modules/urllib3/default.nix
@@ -4,11 +4,11 @@
 
 buildPythonPackage rec {
   pname = "urllib3";
-  version = "1.24.3";
+  version = "1.25.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2393a695cd12afedd0dcb26fe5d50d0cf248e5a66f75dbd89a3d4eb333a61af4";
+    sha256 = "9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86";
   };
 
   outputs = [ "out" "dev" ];