diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 93913bbf54d..16cf17d6b62 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12731,12 +12731,12 @@ in {
   };
 
   ipykernel = buildPythonPackage rec {
-    version = "4.5.0";
+    version = "4.5.1";
     name = "ipykernel-${version}";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/i/ipykernel/${name}.tar.gz";
-      sha256 = "245a798edb8fd751b95750d8645d736dd739a020e7fc7d5627dac4d1c35d8295";
+      sha256 = "520c855c6652651c6796a3dd8bc89d533023ac65c5ccf812908187d6f0e461da";
     };
 
     buildInputs = with self; [ nose ] ++ optionals isPy27 [mock];