diff --git a/requirements.txt b/requirements.txt
index 8f5ee72..453aaec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ Pillow==5.2.0
 protobuf==3.6.1
 pyasn1==0.4.4
 pyasn1-modules==0.2.2
-pycryptodome==3.4.3
+pycryptodome==3.6.6
 Pyrebase==3.0.27
 python-jwt==2.0.1
 pytz==2018.9