diff --git a/setup.py b/setup.py
index 08d999ea7..ae06f5ea1 100644
--- a/setup.py
+++ b/setup.py
@@ -23,9 +23,9 @@
 
 MAJOR = 5
 MINOR = 2
-MICRO = 0
+MICRO = 1
 PRERELEASE = ""
-IS_RELEASED = True
+IS_RELEASED = False
 
 # Templates for version strings.
 RELEASED_VERSION = "{major}.{minor}.{micro}{prerelease}"