diff --git a/Dockerfile b/Dockerfile
index 44eb5d8..7a379e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,8 @@
 
 FROM registry.leenooks.net/leenooks/php:7.2-fpm-plus
 
-RUN echo "deb http://deb.debian.org/debian jessie non-free" >> /etc/apt/sources.list.d/non-free.list && apt-get update \
-	&& apt-get install -y pkg-config libsnmp-dev snmp-mibs-downloader --no-install-recommends \
+RUN echo "deb http://deb.debian.org/debian stretch non-free" >> /etc/apt/sources.list.d/non-free.list && apt-get update \
+	&& apt-get install -y inetutils-ping fping pkg-config libsnmp-dev snmp-mibs-downloader --no-install-recommends \
 	&& download-mibs \
 	&& docker-php-ext-install -j$(nproc) snmp \
 	&& rm -rf /var/lib/apt/lists/* /tmp/*