diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d0c7eb07cdc5cb3cbaeb27c3f954ca569f75e3d..df3a4398098094834d01772bf6c5328e22d72f69 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 Changelog
 =========
 
+Unreleased
+----------
+
 [1.8.1] (2025-02-18)
 --------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index 9206244961185d0645ed68637cdb7f4caaae365d..76829137ea19c16c4cc3d75856886e562f6ad071 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "whisper-asr-webservice"
-version = "1.8.1"
+version = "1.9.0-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"