diff --git a/docs/conf.py b/docs/conf.py
index c285c19e5..62e846a33 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -36,6 +36,8 @@ with codecs.open(init_fn, encoding='utf8') as fd:
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 sys.path.insert(0, os.path.abspath(os.path.join(here, '..')))
+for pkg in 'acme', 'letsencrypt_apache', 'letsencrypt_nginx':
+    sys.path.insert(0, os.path.abspath(os.path.join(here, '..', pkg)))
 
 # -- General configuration ------------------------------------------------