diff --git a/requirements-base.txt b/requirements-base.txt
new file mode 100644
index 0000000..b5e8ae3
--- /dev/null
+++ b/requirements-base.txt
@@ -0,0 +1,5 @@
+future
+pytest
+pytest-runner
+sphinx
+tox
diff --git a/requirements.txt b/requirements.txt
index b5e8ae3..84710e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,25 @@
-future
-pytest
-pytest-runner
-sphinx
-tox
+alabaster==0.7.10
+Babel==2.5.1
+certifi==2017.7.27.1
+chardet==3.0.4
+docutils==0.14
+future==0.16.0
+idna==2.6
+imagesize==0.7.1
+Jinja2==2.9.6
+MarkupSafe==1.0
+pluggy==0.5.2
+py==1.4.34
+Pygments==2.2.0
+pytest==3.2.3
+pytest-runner==3.0
+pytz==2017.3
+requests==2.18.4
+six==1.11.0
+snowballstemmer==1.2.1
+Sphinx==1.6.5
+sphinxcontrib-websupport==1.0.1
+tox==2.9.1
+typing==3.6.2
+urllib3==1.22
+virtualenv==15.1.0