diff --git a/pkgs/misc/urbit/default.nix b/pkgs/misc/urbit/default.nix
index e3d6d40bdac..125df39ae8a 100644
--- a/pkgs/misc/urbit/default.nix
+++ b/pkgs/misc/urbit/default.nix
@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation rec {
   name = "urbit-${version}";
-  version = "0.4";
+  version = "0.4.5";
 
   src = fetchFromGitHub {
     owner = "urbit";
     repo = "urbit";
     rev = "v${version}";
-    sha256 = "1ndy58ypilabf9pfkqzzl7wf6x1vr4gpvsbn30sygp2ip908q0xz";
+    sha256 = "1zgxgqbz74nsgfyrvsnjj6xxpb64mrnby7bb5qy733sy04gmzgik";
   };
 
   buildInputs = with stdenv.lib; [