diff --git a/build.gradle b/build.gradle
index 71d8afcdd52..f93c6f06abd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -15,8 +15,8 @@ plugins {
 }
 
 group 'org.jetbrains.lets-plot'
-version "1.0.1-SNAPSHOT"
-project.ext.js_artifact_version = "1.0.dev1"
+version "1.1.0rc1"
+project.ext.js_artifact_version = "1.1.0rc1"
 
 /*
  * Copyright (c) 2019. JetBrains s.r.o.
diff --git a/python-package/lets_plot/_version.py b/python-package/lets_plot/_version.py
index 5c81d461385..c6e47f57f79 100644
--- a/python-package/lets_plot/_version.py
+++ b/python-package/lets_plot/_version.py
@@ -3,4 +3,4 @@
 # Use of this source code is governed by the MIT license that can be found in the LICENSE file.
 #
 # see: https://www.python.org/dev/peps/pep-0440/#developmental-releases
-__version__ = '1.0.dev1'
+__version__ = '1.1.0rc1'