diff --git a/Dockerfile b/Dockerfile
index 97b987a..ef2367f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.21 as builder
+FROM golang:1.26@sha256:68cb6d68bed024785b69195b89af7ac7a444f27791435f98647edff595aa0479 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests