diff --git a/pkgs/tools/misc/kepubify/default.nix b/pkgs/tools/misc/kepubify/default.nix
index cd30674b31a..0a6888bb342 100644
--- a/pkgs/tools/misc/kepubify/default.nix
+++ b/pkgs/tools/misc/kepubify/default.nix
@@ -2,16 +2,16 @@
 
 buildGoModule rec {
   pname = "kepubify";
-  version = "4.0.3";
+  version = "4.0.4";
 
   src = fetchFromGitHub {
     owner = "pgaskin";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-pe4jNBoPjrkvsdeFjH4TNwacp0qkf+v+SjIAZqV1GWE=";
+    sha256 = "sha256-H6W+C5twXit7Z9hLIJKAftbnvYDA9HAb9tR6yeQGRKI=";
   };
 
-  vendorSha256 = "sha256-eiFG6lgsY5hf+XT3Kf5uA4Ai8vBbPsh1T4ObV+rj30Y=";
+  vendorSha256 = "sha256-QOMLwDDvrDQAaK4M4QhBFTGD1CzblkDoA3ZqtCoRHtQ=";
 
   ldflags = [ "-s" "-w" "-X main.version=${version}" ];