diff --git a/pkgs/tools/networking/cassowary/default.nix b/pkgs/tools/networking/cassowary/default.nix
index f0aecf7363a..527ecfbf98d 100644
--- a/pkgs/tools/networking/cassowary/default.nix
+++ b/pkgs/tools/networking/cassowary/default.nix
@@ -2,16 +2,16 @@
 
 buildGoModule rec {
   pname = "cassowary";
-  version = "0.13.0";
+  version = "0.14.0";
 
   src = fetchFromGitHub {
     owner = "rogerwelin";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-IaS2QU9DBupv06AMzJXBM2iZkNVw31Pt1bOMQNBEiq0=";
+    sha256 = "sha256-rQNrxAKf2huY9I6iqdf1iYxgXaQI0LG1Lkrnv1OuJsg=";
   };
 
-  vendorSha256 = "sha256-RuwrnuTNfiYpIuohw7OQv95hjOAeWCMuajsZVUUDxBQ=";
+  vendorSha256 = "sha256-hGpiL88x2roFEjJJM4CKyt3k66VK1pEnpOwvhDPDp6M=";
 
   doCheck = false;