diff --git a/requirements.txt b/requirements.txt
index a137d11..93b35b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ protobuf==3.5.1
 pyasn1==0.4.2
 pyasn1-modules==0.2.1
 pycparser==2.17
-pycryptodome==3.4.3
+pycryptodome==3.6.6
 pyOpenSSL==17.0.0
 pyparsing==2.1.4
 Pyrebase==3.0.27