diff --git a/requirements-test.txt b/requirements-test.txt
index b3585d295590f9ed033331c969f8ba0c9a45f4ae..7f19cc6e3a3a8f369a1627bf5e6751298c9af115 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -6,7 +6,7 @@ ecdsa==0.13
 requests==2.19.1
 websocket-client==0.48.0
 pytz==2018.4
-pycryptodomex==3.6.1
+pycryptodomex==3.6.3
 scrypt==0.8.6
 Events==0.3
 secp256k1==0.13.2