diff --git a/docs/requirements.txt b/docs/requirements.txt
index 9bc3c75..95285cc 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -14,3 +14,5 @@ sphinxcontrib-jquery
 sphinxcontrib-jsmath
 sphinxcontrib-qthelp
 sphinxcontrib-serializinghtml
+linkify
+