diff --git a/Dockerfile b/Dockerfile
index 97b987a..2c75d11 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:1e598ea5752ae26c093b746fd73c5095af97d6f2d679c43e83e0eac484a33dc3 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests