diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5f415c01..25ce8a0d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.5.2 (unreleased)
+
+
+
 ## 1.5.1 (March 13, 2014)
 
 IMPROVEMENTS:
diff --git a/version.txt b/version.txt
index 26ca59460..c2cbe522a 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.5.1
+1.5.2.dev