diff --git a/bigquery/setup.py b/bigquery/setup.py
index 69fbb9cc5eb6..98dc37c8cc7a 100644
--- a/bigquery/setup.py
+++ b/bigquery/setup.py
@@ -54,7 +54,7 @@
     'google-cloud-core >= 0.26.0, < 0.27dev',
     'google-auth >= 1.0.0',
     'google-resumable-media >= 0.2.1',
-    'requests >= 2.0.0',
+    'requests >= 2.18.0',
 ]
 
 setup(
diff --git a/core/setup.py b/core/setup.py
index f697e385494b..96d7567b9de6 100644
--- a/core/setup.py
+++ b/core/setup.py
@@ -54,7 +54,7 @@
     'googleapis-common-protos >= 1.3.4',
     'protobuf >= 3.0.0',
     'google-auth >= 0.4.0, < 2.0.0dev',
-    'requests >= 2.4.0, < 3.0.0dev',
+    'requests >= 2.18.0, < 3.0.0dev',
     'setuptools >= 34.0.0',
     'six',
     'tenacity >= 4.0.0, <5.0.0dev'
diff --git a/storage/setup.py b/storage/setup.py
index 9365b0175087..90d7c87699b0 100644
--- a/storage/setup.py
+++ b/storage/setup.py
@@ -54,7 +54,7 @@
     'google-cloud-core >= 0.26.0, < 0.27dev',
     'google-auth >= 1.0.0',
     'google-resumable-media >= 0.2.3',
-    'requests >= 2.0.0',
+    'requests >= 2.18.0',
 ]
 
 setup(