diff --git a/Dockerfile b/Dockerfile
index f39ea3c..1504da1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM debian:bookworm-slim
 
-ARG HUGO_VERSION=$HUGO_VERSION
-ARG WEBHOOK_VERSION=$WEBHOOK_VERSION
+ARG HUGO_VERSION
+ARG WEBHOOK_VERSION
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Install dependencies