diff --git a/Dockerfile b/Dockerfile
index 97b987a..e196f17 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:f44f6e88636cfb311f9ebace870ded69d943f227bb3cb27d32ffd84ea18c43ea as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests