diff --git a/setup.py b/setup.py
index 56662a17b..0d5d4a907 100644
--- a/setup.py
+++ b/setup.py
@@ -27,6 +27,7 @@
 dependencies = [
     "google-api-core[grpc] >= 1.22.2, < 2.0.0dev",
     "google-cloud-core >= 1.4.1, < 2.0dev",
+    "packaging >= 14.3",
     "pytz",
     "proto-plus >= 1.10.0",
 ]