diff --git a/Dockerfile b/Dockerfile
index ac0d823..53eb1fd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
 # version 1.6.1-2
 # docker-version 1.11.1
-FROM ubuntu:15.04
+FROM ubuntu:18.04
 MAINTAINER Jim Myhrberg "contact@jimeh.me"
 
-ENV ZNC_VERSION 1.6.1
+ENV ZNC_VERSION 1.7.3
 
 RUN apt-get update \
     && apt-get install -y sudo wget build-essential libssl-dev libperl-dev \