diff --git a/bycycle/version.py b/bycycle/version.py
index ca5373e5..195ef069 100644
--- a/bycycle/version.py
+++ b/bycycle/version.py
@@ -1 +1 @@
-__version__ = '1.0.0-dev'
+__version__ = '1.0.0rc1'