diff --git a/pkgs/development/python-modules/uncertainties/default.nix b/pkgs/development/python-modules/uncertainties/default.nix
index 2d7fdaa7eca..6e357f307e3 100644
--- a/pkgs/development/python-modules/uncertainties/default.nix
+++ b/pkgs/development/python-modules/uncertainties/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "uncertainties";
-  version = "3.0.3";
+  version = "3.1.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1hp00k10d5n69s446flss8b4rd02wq8dscvakv7ylfyf2p8y564s";
+    sha256 = "18b184110cbe31303d25a7bc7f73d51b9cb4e15563cb9aa25ccfbd0ebe07d448";
   };
 
   buildInputs = [ nose numpy ];