diff --git a/pkgs/development/python-modules/carbon/default.nix b/pkgs/development/python-modules/carbon/default.nix
index 0398782900d..755f9211746 100644
--- a/pkgs/development/python-modules/carbon/default.nix
+++ b/pkgs/development/python-modules/carbon/default.nix
@@ -4,13 +4,13 @@
 
 buildPythonPackage rec {
   pname = "carbon";
-  version = "1.1.4";
+  version = "1.1.5";
 
   disabled = isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1b70e34ac0f0bd32a03ee14eaf1ed2c857e208984fc9761f59a95c21c5264513";
+    sha256 = "a88390553a9ea628fdb74b5b358ed83a657e058bcc811e5819d9db856b4fcf5b";
   };
 
   propagatedBuildInputs = [ twisted whisper txamqp cachetools urllib3 ];