diff --git a/letsencrypt-auto b/letsencrypt-auto
index 20465db..fa4453c 100755
--- a/letsencrypt-auto
+++ b/letsencrypt-auto
@@ -176,6 +176,7 @@ if [ "$VERBOSE" = 1 ]  ; then
   echo
   $VENV_BIN/pip install -U setuptools
   $VENV_BIN/pip install -U pip
+  $VENV_BIN/pip install -U pyopenssl ndg-httpsclient pyasn1 
   $VENV_BIN/pip install -U letsencrypt letsencrypt-apache
   # nginx is buggy / disabled for now, but upgrade it if the user has
   # installed it manually
@@ -190,6 +191,7 @@ else
   # nginx is buggy / disabled for now...
   $VENV_BIN/pip install -U letsencrypt > /dev/null
   printf .
+  $VENV_BIN/pip install -U pyopenssl ndg-httpsclient pyasn1  # <- added this here
   $VENV_BIN/pip install -U letsencrypt-apache > /dev/null
   if $VENV_BIN/pip freeze | grep -q letsencrypt-nginx ; then
     printf .