diff --git a/api_core/setup.py b/api_core/setup.py
index d488fa01b7a2..8998a389daf7 100644
--- a/api_core/setup.py
+++ b/api_core/setup.py
@@ -65,7 +65,7 @@
 
 setup(
     name='google-api-core',
-    version='0.1.1',
+    version='0.1.2.dev1',
     description='Core Google API Client Library',
     long_description=README,
     namespace_packages=['google'],
diff --git a/core/setup.py b/core/setup.py
index acea6a3ffd20..4e8000780761 100644
--- a/core/setup.py
+++ b/core/setup.py
@@ -60,7 +60,7 @@
 
 setup(
     name='google-cloud-core',
-    version='0.28.0',
+    version='0.28.1.dev1',
     description='API Client library for Google Cloud: Core Helpers',
     long_description=README,
     namespace_packages=[