diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0704da3044..30814aaae2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,29 @@
+# Unreleased
+
+### New feature
+
+* Add service discovery plugin and `out_forward` use it
+  https://github.com/fluent/fluentd/pull/2541
+
+### Enhancement
+
+* formatter_csv: Support nested fields
+  https://github.com/fluent/fluentd/pull/2643
+* record_accessor helper: Make code simple and bit faster
+  https://github.com/fluent/fluentd/pull/2660
+* clean up internal classes / code
+  https://github.com/fluent/fluentd/pull/2647
+  https://github.com/fluent/fluentd/pull/2648
+  https://github.com/fluent/fluentd/pull/2653
+  https://github.com/fluent/fluentd/pull/2654
+  https://github.com/fluent/fluentd/pull/2657
+
+### Bug fixes
+
+* suppress warning
+  https://github.com/fluent/fluentd/pull/2652
+
+
 # v1.7
 
 ## Release v1.7.4 - 2019/10/24
diff --git a/lib/fluent/version.rb b/lib/fluent/version.rb
index 996366c732..45fe1396c5 100644
--- a/lib/fluent/version.rb
+++ b/lib/fluent/version.rb
@@ -16,6 +16,6 @@
 
 module Fluent
 
-  VERSION = '1.7.4'
+  VERSION = '1.8.0.rc1'
 
 end