diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 8675cbe..a30d1f0 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 1.8.3
+current_version = 1.9.0
 commit = True
 tag = True
 
diff --git a/reacton/_version.py b/reacton/_version.py
index a44132d..0a0a43a 100644
--- a/reacton/_version.py
+++ b/reacton/_version.py
@@ -1 +1 @@
-__version__ = "1.8.3"
+__version__ = "1.9.0"
diff --git a/release.md b/release.md
index 49c4a1e..7ac23ba 100644
--- a/release.md
+++ b/release.md
@@ -7,7 +7,7 @@
 To make a new release
 ```
 # update reacton/_version.py
-$ git add -u && git commit -m 'Release v1.8.3' && git tag v1.8.3 && git push upstream master v1.8.3
+$ git add -u && git commit -m 'Release v1.9.0' && git tag v1.9.0 && git push upstream master v1.9.0
 ```
 
 
@@ -15,5 +15,5 @@ If a problem happens, and you want to keep the history clean
 ```
 # do fix
 $ git rebase -i HEAD~3
-$ git tag v1.8.3 -f &&  git push upstream master v1.8.3 -f
+$ git tag v1.9.0 -f &&  git push upstream master v1.9.0 -f
 ```