diff --git a/databricks/koalas/version.py b/databricks/koalas/version.py
index c51179285..b7b311b51 100644
--- a/databricks/koalas/version.py
+++ b/databricks/koalas/version.py
@@ -14,4 +14,4 @@
 # limitations under the License.
 #
 
-__version__ = "1.8.0"
+__version__ = "1.8.1"