diff --git a/Dockerfile b/Dockerfile
index 2c7a85e..0a8caaf 120000
--- a/Dockerfile
+++ b/Dockerfile
@@ -1 +1 @@
-openjdk-7-jre/Dockerfile
\ No newline at end of file
+oracle-java8/Dockerfile
\ No newline at end of file
diff --git a/oracle-java8/Dockerfile b/oracle-java8/Dockerfile
index 2d9946f..66c0f31 100644
--- a/oracle-java8/Dockerfile
+++ b/oracle-java8/Dockerfile
@@ -6,10 +6,12 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:18.04
 
 # Install Java.
 RUN \
+  apt-get update && \
+  apt-get install -y software-properties-common && \
   echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
   add-apt-repository -y ppa:webupd8team/java && \
   apt-get update && \