diff --git a/Dockerfile b/Dockerfile
index 97b987a..f724a58 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:b54cbf583d390341599d7bcbc062425c081105cc5ef6d170ced98ef9d047c716 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests