diff --git a/lib/diaspora_federation.rb b/lib/diaspora_federation.rb
index dd632aa..6de256b 100644
--- a/lib/diaspora_federation.rb
+++ b/lib/diaspora_federation.rb
@@ -1,3 +1,5 @@
+require "nokogiri"
+
 require "diaspora_federation/version"
 
 require "diaspora_federation/logging"