diff --git a/Dockerfile b/Dockerfile
index 97b987a..ee893bc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:f96cc555eb8db430159a3aa6797cd5bae561945b7b0fe7d0e284c63a3b291609 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests