diff --git a/CHANGELOG.md b/CHANGELOG.md
index b39f6b5a7..23c53b92e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.5.1 (unreleased)
+
+
+
 ## 1.5.0 (March 10, 2014)
 
 DEPRECATIONS:
diff --git a/version.txt b/version.txt
index bc80560fa..481667c26 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.5.0
+1.5.1.dev