diff --git a/setup.py b/setup.py
index 6331a49..a03eecc 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,7 @@
     "httplib2>=0.9.2,<1dev",
     "google-auth>=1.16.0",
     "google-auth-httplib2>=0.0.3",
-    "google-api-core>=1.17.0,<2dev",
+    "google-api-core>=1.18.0,<2dev",
     "six>=1.6.1,<2dev",
     "uritemplate>=3.0.0,<4dev",
 ]