diff --git a/Dockerfile b/Dockerfile
index 97b987a2..2c771802 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:512690a5660563b57d37ecc31129e7f136e831db2aed24a1dbeb8ad7380dc0fa as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests