diff --git a/CHANGELOG.md b/CHANGELOG.md
index a58d59e08..506e1c98e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.7.3 (unreleased)
+
+
+
 ## 1.7.2 (January 6, 2015)
 
 BREAKING CHANGES:
diff --git a/version.txt b/version.txt
index f8a696c8d..2cabfbe9b 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.7.2
+1.7.3.dev