diff --git a/voicevox/__init__.py b/voicevox/__init__.py
index 574e29f..03da4a8 100644
--- a/voicevox/__init__.py
+++ b/voicevox/__init__.py
@@ -15,4 +15,4 @@
     "HttpException", "NotfoundError",
     "Speaker", "Style", "SupportedFeature"
 )
-__version__ = "0.1.4"
+__version__ = "0.1.5rc"