diff --git a/AppDB/setup.py b/AppDB/setup.py
index c49d884f36..2eb5a18742 100644
--- a/AppDB/setup.py
+++ b/AppDB/setup.py
@@ -11,7 +11,7 @@
   platforms='Posix',
   install_requires=[
     'appscale-common',
-    'cassandra-driver',
+    'cassandra-driver<3.18.0',
     'kazoo',
     'M2Crypto',
     'mmh3',
diff --git a/AppTaskQueue/setup.py b/AppTaskQueue/setup.py
index 4b8e7627d0..e2eacfde33 100644
--- a/AppTaskQueue/setup.py
+++ b/AppTaskQueue/setup.py
@@ -12,7 +12,7 @@
   platforms='Posix',
   install_requires=[
     'appscale-common',
-    'cassandra-driver',
+    'cassandra-driver<3.18.0',
     'celery>=3.1,<4.0.0',
     'eventlet==0.22',
     'kazoo',