diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 311219ebecb1..7d5de855e176 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -10729,12 +10729,12 @@ in modules // {
   };
 
   ipykernel = buildPythonPackage rec {
-    version = "4.3.0";
+    version = "4.3.1";
     name = "ipykernel-${version}";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/i/ipykernel/${name}.tar.gz";
-      sha256 = "1av769gbzfm1zy9p94wicwwwxmyc7s7zk1ginq16x0wc69hwc57j";
+      sha256 = "0gycnxzq3nnmh6xlc24n3b4qc28gli0lw4a9yg2yzm74lgmd66c2";
     };
 
     buildInputs = with self; [ nose ] ++ optionals isPy27 [mock];