explicitly set theme
diff --git a/pelicanconf.py b/pelicanconf.py
index f854edf..695d6d5 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -67,6 +67,7 @@
 }
 
 # TOC Generator
+THEME = 'theme/openoffice'
 PLUGIN_PATHS = ['./theme/plugins']
 PLUGINS = ['asfgenid', 'pelican-gfm']