diff --git a/requirements.txt b/requirements.txt
index e538e00..69c356b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,8 @@
-flake8
-docutils
-pytest
-pytest-aiohttp
-pytest-cov
-pytest-sugar
-sphinx
+flake8==3.0.4
+docutils==0.12
+pytest==3.0.2
+pytest-aiohttp==0.1.2
+pytest-cov==2.3.1
+pytest-sugar==0.7.1
+sphinx==1.4.6
 -e .