diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8e2db1bfe..039b593ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+## Next version (Unreleased)
+
+FEATURES:
+
+IMPROVEMENTS:
+
+BUG FIXES:
+
 ## 2.1.5 (September 12, 2018)
 
 IMPROVEMENTS:
diff --git a/version.txt b/version.txt
index cd57a8b95..c81ba7f59 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.1.5
+2.1.6.dev