diff --git a/.npmignore b/.npmignore
index 39db6584..ed8a791b 100644
--- a/.npmignore
+++ b/.npmignore
@@ -6,3 +6,4 @@ test
 .gitignore
 build-docs.sh
 README.md
+requirements.txt
diff --git a/.travis.yml b/.travis.yml
index 9a7077c1..93c33e20 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ node_js:
 - '6'
 install:
 - npm install
-- test -z "$BUILD_DOCS" || pip install --user sphinx
+- test -z "$BUILD_DOCS" || pip install -r requirements.txt
 script:
 - travis_retry npm run test-travis
 - test -z "$BUILD_DOCS" || cd docs
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 00000000..db153967
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,22 @@
+alabaster==0.7.7
+argh==0.26.1
+Babel==2.2.0
+backports-abc==0.4
+backports.ssl-match-hostname==3.5.0.1
+certifi==2016.2.28
+docutils==0.12
+Jinja2==2.8
+livereload==2.4.1
+MarkupSafe==0.23
+pathtools==0.1.2
+port-for==0.3.1
+Pygments==2.1.3
+pytz==2016.1
+PyYAML==3.11
+singledispatch==3.4.0.3
+six==1.10.0
+snowballstemmer==1.2.1
+Sphinx==1.3.6
+sphinx-autobuild==0.6.0
+tornado==4.3
+watchdog==0.8.3