diff --git a/Dockerfile b/Dockerfile
index f96a948..da69f90 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,7 +11,7 @@ RUN apt-get update && apt-get upgrade -y
 #
 
 # install required packages
-RUN apt-get install apache2 apache2-utils libapache2-mod-svn subversion
+RUN apt-get install -y apache2 apache2-utils libapache2-mod-svn subversion 
 
 # add svn configuration
 ADD dav_svn.conf /etc/apache2/sites-enabled/dav_svn.conf