diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ba1e85..26be342 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ Changelog
 Unreleased
 ----------
 
+[1.4.0] (2024-04-17)
+--------------------
+
 ### Changed
 
 - Upgraded
@@ -176,6 +179,7 @@ Unreleased
 - mp3 support by using FFmpeg instead of librosa in #8
 - add language detection endpoint in #9
 
+[1.4.0]: https://github.com/ahmetoner/whisper-asr-webservice/releases/tag/v1.4.0
 [1.3.0]: https://github.com/ahmetoner/whisper-asr-webservice/releases/tag/v1.3.0
 [1.2.4]: https://github.com/ahmetoner/whisper-asr-webservice/releases/tag/v1.2.4
 [1.2.3]: https://github.com/ahmetoner/whisper-asr-webservice/releases/tag/v1.2.3
diff --git a/README.md b/README.md
index 8515881..05a39ff 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 Whisper is a general-purpose speech recognition model. It is trained on a large dataset of diverse audio and is also a multitask model that can perform multilingual speech recognition as well as speech translation and language identification. For more details: [github.com/openai/whisper](https://github.com/openai/whisper/)
 
 ## Features
-Current release (v1.3.0) supports following whisper models:
+Current release (v1.4.0) supports following whisper models:
 
 - [openai/whisper](https://github.com/openai/whisper)@[v20231117](https://github.com/openai/whisper/releases/tag/v20231117)
 - [SYSTRAN/faster-whisper](https://github.com/SYSTRAN/faster-whisper)@[v0.10.0](https://github.com/SYSTRAN/faster-whisper/releases/tag/0.10.0)
diff --git a/docs/index.md b/docs/index.md
index 4aec352..fcb08a8 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -1,7 +1,7 @@
 Whisper is a general-purpose speech recognition model. It is trained on a large dataset of diverse audio and is also a multitask model that can perform multilingual speech recognition as well as speech translation and language identification.
 
 ## Features
-Current release (v1.3.0) supports following whisper models:
+Current release (v1.4.0) supports following whisper models:
 
 - [openai/whisper](https://github.com/openai/whisper)@[v20231117](https://github.com/openai/whisper/releases/tag/v20231117)
 - [SYSTRAN/faster-whisper](https://github.com/SYSTRAN/faster-whisper)@[v0.10.0](https://github.com/SYSTRAN/faster-whisper/releases/tag/0.10.0)
diff --git a/pyproject.toml b/pyproject.toml
index ac33d0d..d24fba0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "whisper-asr-webservice"
-version = "1.4.0-dev"
+version = "1.4.0"
 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"