diff --git a/build.xml b/build.xml
index bb18455..e774bb0 100644
--- a/build.xml
+++ b/build.xml
@@ -3,11 +3,10 @@
  <target name="clean" description="Cleanup build artifacts">
   <delete dir="${basedir}/vendor"/>
   <delete file="${basedir}/composer.lock"/>
-  <delete file="${basedir}/composer.phar"/>
  </target>
 
  <target name="composer" depends="clean" description="Install dependencies with Composer">
-  <get src="https://getcomposer.org/composer.phar" dest="${basedir}/composer.phar"/>
+  <get src="https://getcomposer.org/composer.phar" dest="${basedir}/composer.phar" skipexisting="true"/>
 
   <exec executable="php">
    <arg value="composer.phar"/>