diff --git a/Dockerfile b/Dockerfile
index 691932fd..924211ad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,13 +3,13 @@ FROM debian:buster-slim
 ARG dir="/home/pi/pialert"
 
 #Update and reduce image size
-RUN apt update \
-    && apt install --no-install-recommends apt-utils cron sudo lighttpd php php-cgi php-fpm php-sqlite3 sqlite3 dnsutils net-tools python iproute2 -y \
+RUN apt-get update \
+    && apt-get install --no-install-recommends apt-utils cron sudo lighttpd php php-cgi php-fpm php-sqlite3 sqlite3 dnsutils net-tools python iproute2 -y \
     #Install without the --no-install-recommends flag
-    && apt install curl arp-scan -y \
+    && apt-get install curl arp-scan -y \
     #clean-up
-    && apt clean autoclean \
-    && apt autoremove 
+    && apt-get clean autoclean \
+    && apt-get autoremove 
 
 #add the pi user
 RUN useradd -ms /bin/bash pi