diff --git a/bootstrap.sh b/bootstrap.sh
index 6626c81..1ca6e66 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -18,7 +18,7 @@ apt-get install -y lsb-release apt-transport-https
 # add official Tor repository
 if ! grep -q "https://deb.torproject.org/torproject.org" /etc/apt/sources.list; then
     echo "== Adding the official Tor repository"
-    echo "deb http://deb.torproject.org/torproject.org `lsb_release -cs` main" >> /etc/apt/sources.list
+    echo "deb https://deb.torproject.org/torproject.org `lsb_release -cs` main" >> /etc/apt/sources.list
     gpg --keyserver keys.gnupg.net --recv A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89
     gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | apt-key add -
     apt-get update