diff --git a/Dockerfile b/Dockerfile
index 97b987a..10477bd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:e432b43af23a9328d56a7c499be0476810aa344acbcf65fc7c455d4ff5a40602 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests