diff --git a/package.nix b/package.nix
index d97a3e1..d65e868 100644
--- a/package.nix
+++ b/package.nix
@@ -6,7 +6,7 @@ buildGoModule {
 
   src = ./.;
 
-  vendorHash = null;
+  vendorHash = "sha256-VvZcnTEgPXlAYEf2+2WZ2xlU4TWhTz+dBiA4j76GSvM=";
 
   meta = {
     homepage = "https://git.ny4.dev/nyancat/ip-checker";