diff --git a/requirements.txt b/requirements.txt
index 3b75921..aa19bdd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 git+https://github.com/fabpot/sphinx-php.git
 sphinx~=1.4.0
 sphinx-rtd-theme==0.1.6
-sphinxcontrib-spelling
+sphinxcontrib-spelling==4.2.0
 pyenchant
 docutils==0.12