diff --git a/Dockerfile b/Dockerfile
index 5f3d19f..8b29ca8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ RUN chmod +x /usr/local/bin/apt-get-install
 
 RUN apt-get-install build-essential libtool g++ gcc \
     texinfo curl wget automake autoconf python python-dev git subversion \
-    unzip virtualenvwrapper sudo  git virtualenvwrapper
+    unzip virtualenvwrapper sudo  git virtualenvwrapper ca-certificates
 
 RUN useradd -m ctf
 RUN echo "ctf ALL=NOPASSWD: ALL" > /etc/sudoers.d/ctf