diff --git a/Dockerfile b/Dockerfile
index 97b987a..9e5f068 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:0d1d3a794be25f809dd2cb3160d8c73276c4056a9f8242a138e908ddeee7b6b6 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests