diff --git a/harp/__init__.py b/harp/__init__.py
index 8012ec8d..78de937f 100644
--- a/harp/__init__.py
+++ b/harp/__init__.py
@@ -46,7 +46,7 @@ def _parse_version(version: str, /, *, default=None) -> Version:
 
 # last release
 __title__ = "Core"
-__version__ = "0.5.0b3"
+__version__ = "0.5.0b4"
 __revision__ = __version__  # we can't commit the not yet known revision
 
 # override with version.txt if available (after docker build for example)
diff --git a/misc/helm/charts/harp-proxy/Chart.yaml b/misc/helm/charts/harp-proxy/Chart.yaml
index 68584cd4..ab841ebf 100644
--- a/misc/helm/charts/harp-proxy/Chart.yaml
+++ b/misc/helm/charts/harp-proxy/Chart.yaml
@@ -3,7 +3,7 @@ name: harp-proxy
 description: HTTP API Runtime Proxy
 type: application
 version: "0.1.0"
-appVersion: "0.5.0b3"
+appVersion: "0.5.0b4"
 
 dependencies:
   - name: postgresql
diff --git a/pyproject.toml b/pyproject.toml
index 65de2b91..6b45ad79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "harp-proxy"
-version = "0.5.0b3"
+version = "0.5.0b4"
 description = "Harp is an API Runtime Proxy – A toolkit for Fast, Reliable and Observable external APIs"
 authors = ["Romain Dorgueil <romain@makersquad.fr>"]
 readme = "README.rst"