diff --git a/covenant-signer/Dockerfile b/covenant-signer/Dockerfile
index 8fc3e2f..08b5f03 100644
--- a/covenant-signer/Dockerfile
+++ b/covenant-signer/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.23.1-alpine as builder
+FROM golang:1.23.1-alpine AS builder
 
 # Use muslc for static libs
 ARG BUILD_TAGS="muslc"