diff --git a/Dockerfile b/Dockerfile
index 97b987a..0b6d229 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:fcdb3e42c5544e9682a635771eac76a698b66de79b1b50ec5b9ce5c5f14ad775 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests