diff --git a/alertmanager-ntfy/Containerfile b/alertmanager-ntfy/Containerfile
index fe508ea..e1414d3 100644
--- a/alertmanager-ntfy/Containerfile
+++ b/alertmanager-ntfy/Containerfile
@@ -1,4 +1,4 @@
-FROM docker.io/golang:latest as builder
+FROM docker.io/library/golang:1 as builder
 ARG CGO_ENABLED=0
 WORKDIR /app