diff --git a/Dockerfile b/Dockerfile
index 97b987a..6437521 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:f20d83a83e18dbd2a4714b8ffd4b30b287b6243962dd75608e86abcc63ba4efc as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests