diff --git a/Dockerfile b/Dockerfile
index 97b987a2..b0b6e813 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.25@sha256:1c91b4f4391774a73d6489576878ad3ff3161ebc8c78466ec26e83474855bfcf as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests