diff --git a/lib/gmo/version.rb b/lib/gmo/version.rb
index e80abd6..c7de8b8 100644
--- a/lib/gmo/version.rb
+++ b/lib/gmo/version.rb
@@ -1,3 +1,3 @@
 module GMO
-  VERSION = "0.5.7"
+  VERSION = "0.5.8"
 end