diff --git a/Dockerfile b/Dockerfile
index ba52571..9031336 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,7 +22,10 @@ RUN apk add --no-cache \
     nagios-plugins-tcp \
     nagios-web \
     nrpe-plugin \
+    openssh-client-common \
     perl \
+    python3 \
+    py3-dnspython \
     ssmtp \
     tini && \
     chown nagios /etc/ssmtp/ssmtp.conf
@@ -30,7 +33,9 @@ RUN apk add --no-cache \
 COPY FREE_send_notification.sh /usr/bin/FREE_send_notification.sh
 COPY entrypoint.sh /docker-entrypoint.sh
 
+ADD https://raw.githubusercontent.com/stump/check_sshfp/master/check_sshfp /usr/lib/nagios/plugins/check_sshfp
 ADD https://gist.githubusercontent.com/nemunaire/9669659/raw/977cfce7246249c17e213b0b2b231220257754fa/nagios-status.pl /usr/bin/nagios-status.pl
+RUN chmod +x /usr/lib/nagios/plugins/check_sshfp /usr/bin/nagios-status.pl
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 USER nagios