diff --git a/README.md b/README.md
index 80adc0583..757a3f8cd 100644
--- a/README.md
+++ b/README.md
@@ -36,13 +36,15 @@ pip install firebase-admin
 
 Please refer to the [CONTRIBUTING page](./CONTRIBUTING.md) for more information
 about how you can contribute to this project. We welcome bug reports, feature
-requests, code review feedback, and also pull requests. 
+requests, code review feedback, and also pull requests.
 
 
 ## Supported Python Versions
 
-We support Python 2.7 and Python 3.3+. Firebase Admin Python SDK is also tested
-on PyPy and [Google App Engine](https://cloud.google.com/appengine/) environments.
+We currently support Python 2.7 and Python 3.4+. However, Python 2.7 support is
+being phased out, and the developers are advised to use latest Python 3.
+Firebase Admin Python SDK is also tested on PyPy and
+[Google App Engine](https://cloud.google.com/appengine/) environments.
 
 
 ## Documentation
diff --git a/requirements.txt b/requirements.txt
index 7a8d855bd..fd73d36bd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,8 +5,8 @@ pytest-localserver >= 0.4.1
 tox >= 3.6.0
 
 cachecontrol >= 0.12.4
-google-api-core[grpc] >= 1.7.0, < 2.0.0dev; platform.python_implementation != 'PyPy'
+google-api-core[grpc] >= 1.14.0, < 2.0.0dev; platform.python_implementation != 'PyPy'
 google-api-python-client >= 1.7.8
-google-cloud-firestore >= 0.31.0; platform.python_implementation != 'PyPy'
-google-cloud-storage >= 1.13.0
+google-cloud-firestore >= 1.4.0; platform.python_implementation != 'PyPy'
+google-cloud-storage >= 1.18.0
 six >= 1.6.1
diff --git a/setup.py b/setup.py
index 15ae97f93..a3cce8be5 100644
--- a/setup.py
+++ b/setup.py
@@ -38,10 +38,10 @@
                     'to integrate Firebase into their services and applications.')
 install_requires = [
     'cachecontrol>=0.12.4',
-    'google-api-core[grpc] >= 1.7.0, < 2.0.0dev; platform.python_implementation != "PyPy"',
+    'google-api-core[grpc] >= 1.14.0, < 2.0.0dev; platform.python_implementation != "PyPy"',
     'google-api-python-client >= 1.7.8',
-    'google-cloud-firestore>=0.31.0; platform.python_implementation != "PyPy"',
-    'google-cloud-storage>=1.13.0',
+    'google-cloud-firestore>=1.4.0; platform.python_implementation != "PyPy"',
+    'google-cloud-storage>=1.18.0',
     'six>=1.6.1'
 ]