diff --git a/requirements.txt b/requirements.txt
index 85a41841..4646c6c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,7 @@ model-mommy==1.2.6
 phonenumbers==7.4.0
 phonenumberslite==7.4.0
 psycopg2==2.7.3.2
-pycryptodome==3.4
+pycryptodome==3.6.6
 pylibmc==1.5.1
 python-dateutil==2.5.3
 python-slugify==1.2.0