diff --git a/pyproject.toml b/pyproject.toml
index df0e61a..ec53712 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ stable_version = "0.5.0"
 
 [tool.poetry]
 name = "whispering"
-version = "0.5.0"
+version = "0.6.0dev0"
 description = "Streaming transcriber with whisper"
 license = "MIT"
 authors = ["Yuta Hayashibe <yuta@hayashibe.jp>"]