diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7d8836fd739ef80b548d8298b3c76d9c496a3d6..baa7a886b9e03421da72aea52bc9af8195b2637c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 Changelog
 =========
 
+Unreleased
+----------
+
 [1.2.3] (2023-11-07)
 --------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index e19d777ad047ffc57df8771f6b517f564b796b22..d508e4e57c36718dafc2daa074ea3192a991f8a5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "whisper-asr-webservice"
-version = "1.2.3"
+version = "1.2.4-dev"
 description = "Whisper ASR Webservice is a general-purpose speech recognition webservice."
 homepage  = "https://github.com/ahmetoner/whisper-asr-webservice/"
 license = "https://github.com/ahmetoner/whisper-asr-webservice/blob/main/LICENCE"