diff --git a/README.md b/README.md
index 0ad0c4a..853c70c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This repository contains **Dockerfile** of [Java](https://www.java.com/) for [Do
 
 ### Base Docker Image
 
-* [dockerfile/ubuntu](http://dockerfile.github.io/#/ubuntu)
+* [ubuntu:14.04](https://registry.hub.docker.com/u/library/ubuntu/)
 
 
 ### Docker Tags
diff --git a/openjdk-6-jdk/Dockerfile b/openjdk-6-jdk/Dockerfile
index 874eec7..4cbf2ae 100644
--- a/openjdk-6-jdk/Dockerfile
+++ b/openjdk-6-jdk/Dockerfile
@@ -6,7 +6,7 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
diff --git a/openjdk-6-jre/Dockerfile b/openjdk-6-jre/Dockerfile
index 7a633bd..c4cccf0 100644
--- a/openjdk-6-jre/Dockerfile
+++ b/openjdk-6-jre/Dockerfile
@@ -6,7 +6,7 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
diff --git a/openjdk-7-jdk/Dockerfile b/openjdk-7-jdk/Dockerfile
index 30fb562..54d55c9 100644
--- a/openjdk-7-jdk/Dockerfile
+++ b/openjdk-7-jdk/Dockerfile
@@ -6,7 +6,7 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
diff --git a/openjdk-7-jre/Dockerfile b/openjdk-7-jre/Dockerfile
index 10be788..4f1460a 100644
--- a/openjdk-7-jre/Dockerfile
+++ b/openjdk-7-jre/Dockerfile
@@ -6,7 +6,7 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
diff --git a/oracle-java6/Dockerfile b/oracle-java6/Dockerfile
index c7b4bc3..3202a71 100644
--- a/oracle-java6/Dockerfile
+++ b/oracle-java6/Dockerfile
@@ -6,11 +6,12 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
   echo oracle-java6-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
+  apt-get install -y software-properties-common && \
   add-apt-repository -y ppa:webupd8team/java && \
   apt-get update && \
   apt-get install -y oracle-java6-installer && \
diff --git a/oracle-java7/Dockerfile b/oracle-java7/Dockerfile
index edf159f..a3c7f68 100644
--- a/oracle-java7/Dockerfile
+++ b/oracle-java7/Dockerfile
@@ -6,11 +6,12 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
   echo oracle-java7-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
+  apt-get install -y software-properties-common && \
   add-apt-repository -y ppa:webupd8team/java && \
   apt-get update && \
   apt-get install -y oracle-java7-installer && \
diff --git a/oracle-java8/Dockerfile b/oracle-java8/Dockerfile
index 2d9946f..5a0f648 100644
--- a/oracle-java8/Dockerfile
+++ b/oracle-java8/Dockerfile
@@ -6,11 +6,12 @@
 #
 
 # Pull base image.
-FROM dockerfile/ubuntu
+FROM ubuntu:14.04
 
 # Install Java.
 RUN \
   echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
+  apt-get install -y software-properties-common && \
   add-apt-repository -y ppa:webupd8team/java && \
   apt-get update && \
   apt-get install -y oracle-java8-installer && \