diff --git a/requirements.txt b/requirements.txt
index 0ccb714..da0ea1d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-arrow
-furl
-requests
-typing
\ No newline at end of file
+arrow==0.10.0
+furl==1.0.0
+requests==2.18.1
+typing==3.6.1
\ No newline at end of file
diff --git a/requirements_test.txt b/requirements_test.txt
index b532f73..68bbcf8 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,3 +1,3 @@
-pytest
-pytest-runner
-requests_mock
\ No newline at end of file
+pytest==3.1.2
+pytest-runner==2.11.1
+requests-mock==1.3.0
\ No newline at end of file