diff --git a/GPy/__version__.py b/GPy/__version__.py
index aa00ec3d..7cdc9d27 100644
--- a/GPy/__version__.py
+++ b/GPy/__version__.py
@@ -1 +1 @@
-__version__ = "0.8.8"
+__version__ = "0.8.9.dev"
diff --git a/setup.cfg b/setup.cfg
index b9b4452f..81f6635b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.8.8
+current_version = 0.8.9.dev
 tag = True
 commit = True
 
@@ -9,4 +9,4 @@ commit = True
 universal = 1
 
 [upload_docs]
-upload-dir = doc/build/html
\ No newline at end of file
+upload-dir = doc/build/html