diff --git a/requirements.txt b/requirements.txt
index 9518917ce953e255d508bf20116ce3eac9e5f92c..afa566eb706bc577fc6fc313a3fa4397a762677e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 setuptools
 six
-sphinx
 numpy
 bob.extension
 bob.bio.base