diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d8a8b9f..143c3105 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change log
 
-## 1.0.0-dev
+## 1.0.0.rc1 (2020-06-10)
 
 - Add `--disable_disconnect` option. ([@palkan][])
 
diff --git a/utils/version.go b/utils/version.go
index ae6ebda2..cd297581 100644
--- a/utils/version.go
+++ b/utils/version.go
@@ -7,7 +7,7 @@ var (
 
 func init() {
 	if version == "" {
-		version = "1.0.0.preview1"
+		version = "1.0.0.rc1"
 	}
 
 	if sha != "" {