diff --git a/Dockerfile b/Dockerfile
index 48541ffd95aa90c9cd0f658f7833834bf04da2ae..00b97e389eda886f7574abfb3aab2f16a64001c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,8 +34,8 @@ RUN apt-get -qq update && \
 RUN rm -f /etc/ssl/certs/java/cacerts; \
     /var/lib/dpkg/info/ca-certificates-java.postinst configure
 
-ADD http://dl.google.com/android/repository/tools_r${VERSION_SDK_TOOLS}-linux.zip /tools.zip
-RUN unzip /tools.zip -d /sdk && \
+RUN curl -s http://dl.google.com/android/repository/tools_r${VERSION_SDK_TOOLS}-linux.zip > /tools.zip && \
+    unzip /tools.zip -d /sdk && \
     rm -v /tools.zip
 
 RUN mkdir -p $ANDROID_HOME/licenses/ \