diff --git a/requirements.txt b/requirements.txt
index 57b7218..d2d6ff2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-requests
-pytest
-pytest-cov
-pytest-mock
+requests==2.13.0
+pytest==3.0.6
+pytest-cov==2.4.0
+pytest-mock==1.5.0