diff --git a/sagemath.spec b/sagemath.spec
index d8cb389..03dcacc 100644
--- a/sagemath.spec
+++ b/sagemath.spec
@@ -288,6 +288,7 @@ BuildRequires:	python-flask-silk
 BuildRequires:	python-ipython
 BuildRequires:	python-matplotlib
 BuildRequires:	python-networkx
+BuildRequires:	python-sphinx
 BuildRequires:	python-twisted-web
 BuildRequires:	python-twisted-web2
 BuildRequires:	polybori-devel
@@ -344,6 +345,7 @@ Requires:	python-ipython
 Requires:	python-matplotlib
 Requires:	python-networkx
 Requires:	python-polybori
+Requires:	python-sphinx
 Requires:	python-twisted-web
 Requires:	python-twisted-web2
 Requires:	python-ZODB3