diff --git a/Dockerfile b/Dockerfile
index f55d494..bf290ad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM debian:buster
 
-RUN apt install -y python3 python3-requests cron
+RUN apt-get update && apt-get install -y python3 python3-requests cron
 
 ADD files/main.py /main.py