diff --git a/pkgs/development/python-modules/backports_unittest-mock/default.nix b/pkgs/development/python-modules/backports_unittest-mock/default.nix
index 3baaa871adf..57d2cad281e 100644
--- a/pkgs/development/python-modules/backports_unittest-mock/default.nix
+++ b/pkgs/development/python-modules/backports_unittest-mock/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "backports.unittest_mock";
-  version = "1.4";
+  version = "1.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "73df9093bc7a2cc8e7018d08d6983dc5bcb2a47d7e7e107b9e8d0711f1702ef8";
+    sha256 = "eff58e53de8fdeb27a1c87a9d57e7b91d15d1bc3854e85344b1a2e69f31ecda7";
   };
 
   propagatedBuildInputs = [ mock ];