diff --git a/Dockerfile b/Dockerfile
index 340434b..f0adede 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-from alpine:latest
+FROM alpine:latest
 RUN apk add --no-cache curl,supercronic
 COPY entrypoint.sh opt
 COPY phc.sh opt