diff --git a/Dockerfile b/Dockerfile
index 97b987a..b78a45d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:65b6f280bf050ec5af12716857e8ea8439d694dbba8f31ceeb7630670071f2bb as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests