diff --git a/requirements-test.txt b/requirements-test.txt
index 7f19cc6e3a3a8f369a1627bf5e6751298c9af115..468a73523d3ae199eb6bca5ff33ee5a79d58ee46 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -5,7 +5,7 @@ future==0.16.0
 ecdsa==0.13
 requests==2.19.1
 websocket-client==0.48.0
-pytz==2018.4
+pytz==2018.5
 pycryptodomex==3.6.3
 scrypt==0.8.6
 Events==0.3