diff --git a/uvloop/_version.py b/uvloop/_version.py
index 3c67960c..8210e8e8 100644
--- a/uvloop/_version.py
+++ b/uvloop/_version.py
@@ -10,4 +10,4 @@
 # supported platforms, publish the packages on PyPI, merge the PR
 # to the target branch, create a Git tag pointing to the commit.
 
-__version__ = '0.20.0'
+__version__ = '0.21.0beta1'