diff --git a/setup.py b/setup.py
index 5d16ecd79..250523423 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
 MINOR = 0
 MICRO = 0
 PRERELEASE = "rc1"
-IS_RELEASED = True
+IS_RELEASED = False
 
 # If this file is part of a Git export (for example created with "git archive",
 # or downloaded from GitHub), ARCHIVE_COMMIT_HASH gives the full hash of the