diff --git a/bigtable/setup.py b/bigtable/setup.py
index a5e7387ac813..4eaf00bd0fd1 100644
--- a/bigtable/setup.py
+++ b/bigtable/setup.py
@@ -51,7 +51,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.21.0, < 0.22dev',
-    'grpcio >= 1.0.0, < 2.0dev',
+    'grpcio >= 1.0.2rc0, < 2.0dev',
 ]
 
 setup(
diff --git a/core/tox.ini b/core/tox.ini
index 3f9dc5ae4218..48e8a517f057 100644
--- a/core/tox.ini
+++ b/core/tox.ini
@@ -4,7 +4,7 @@ envlist =
 
 [testing]
 deps =
-    grpcio
+    grpcio >= 1.0.2rc0
     mock
     pytest
 covercmd =
diff --git a/datastore/setup.py b/datastore/setup.py
index e79548d09a58..b2f84a2bd643 100644
--- a/datastore/setup.py
+++ b/datastore/setup.py
@@ -51,7 +51,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.21.0, < 0.22dev',
-    'grpcio >= 1.0.0, < 2.0dev',
+    'grpcio >= 1.0.2rc0, < 2.0dev',
 ]
 
 setup(
diff --git a/logging/setup.py b/logging/setup.py
index 03b7563ec730..f87c75d7d930 100644
--- a/logging/setup.py
+++ b/logging/setup.py
@@ -51,6 +51,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.21.0, < 0.22dev',
+    'grpcio >= 1.0.2rc0, < 2.0dev',
     'gapic-google-cloud-logging-v2 >= 0.14.0, < 0.15dev',
 ]
 
diff --git a/pubsub/setup.py b/pubsub/setup.py
index 37d9cb9d6496..889a631301c6 100644
--- a/pubsub/setup.py
+++ b/pubsub/setup.py
@@ -51,6 +51,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.21.0, < 0.22dev',
+    'grpcio >= 1.0.2rc0, < 2.0dev',
     'gapic-google-cloud-pubsub-v1 >= 0.14.0, < 0.15dev',
 ]
 
diff --git a/speech/setup.py b/speech/setup.py
index 5b8254826496..5dea2179c35d 100644
--- a/speech/setup.py
+++ b/speech/setup.py
@@ -50,6 +50,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.21.0',
+    'grpcio >= 1.0.2rc0, < 2.0dev',
     'gapic-google-cloud-speech-v1beta1 >= 0.14.0, < 0.15dev',
 ]