diff --git a/Dockerfile b/Dockerfile
index 97b987a..05f04ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.27@sha256:0ecdc2a9f6156af6451080bfe3d8382a662fcc4e209608c6f919e643453514c1 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests