diff --git a/dev-requirements.txt b/dev-requirements.txt
index 58c218e8..9ed5ac2a 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,6 @@
 -rrequirements.txt
 
-Sphinx==1.2.3
+sphinx==1.2.3
 pytest==2.6.4
 ws4py==0.3.4
 pep8==1.5.7
diff --git a/scripts/documentation.sh b/scripts/documentation.sh
index 67f10e6d..92d458f7 100755
--- a/scripts/documentation.sh
+++ b/scripts/documentation.sh
@@ -22,6 +22,6 @@
 set -e
 
 py.test
-python ../gns3server/web/documentation.py
+python3 ../gns3server/web/documentation.py
 cd ../docs
 make html