diff --git a/History.md b/History.md
index e8d47da..c3c0671 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,5 @@
+# UNRELEASED
+
 # 1.9.0 (2018-04-03)
 
 * Add _request_ event to Tunnel emitter