diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index ee2bfff..1b1f6a8 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.9.3"
+  ".": "0.9.4"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87044b5..fe8cb28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,23 @@
 # Changelog
 
+## [0.9.4](https://github.com/reanahub/reana-message-broker/compare/0.9.3...0.9.4) (2025-01-15)
+
+
+### Build
+
+* **python:** add minimal `pyproject.toml` ([#71](https://github.com/reanahub/reana-message-broker/issues/71)) ([a93c1d6](https://github.com/reanahub/reana-message-broker/commit/a93c1d69c8c7d822bb149861529d2e93087a0e54))
+* **python:** remove deprecated `pytest-runner` ([#71](https://github.com/reanahub/reana-message-broker/issues/71)) ([d5d1d50](https://github.com/reanahub/reana-message-broker/commit/d5d1d501414c958375c4cd71dd1e08206dfa5c63))
+* **python:** use optional deps instead of `tests_require` ([#71](https://github.com/reanahub/reana-message-broker/issues/71)) ([bc33342](https://github.com/reanahub/reana-message-broker/commit/bc33342290662c9ccf47741c3a5be828aa79f98a))
+
+
+### Continuous integration
+
+* **actions:** pin setuptools 70 ([#72](https://github.com/reanahub/reana-message-broker/issues/72)) ([1de393e](https://github.com/reanahub/reana-message-broker/commit/1de393efa1c07b7bb9594ec18dd910c39e1054c4))
+* **actions:** update GitHub actions due to Node 16 deprecation ([#68](https://github.com/reanahub/reana-message-broker/issues/68)) ([a93ff15](https://github.com/reanahub/reana-message-broker/commit/a93ff15caa0dc80f0652480e68a2367bcf75aeb7))
+* **actions:** upgrade to Ubuntu 24.04 and Python 3.12 ([#70](https://github.com/reanahub/reana-message-broker/issues/70)) ([a8b37d0](https://github.com/reanahub/reana-message-broker/commit/a8b37d0a9554f21e424d0d151a3dc158f9641b95))
+* **commitlint:** improve checking of merge commits ([#70](https://github.com/reanahub/reana-message-broker/issues/70)) ([dd73d57](https://github.com/reanahub/reana-message-broker/commit/dd73d5730160683e1e1ad4d65a805af936942ea5))
+* **pytest:** invoke `pytest` directly instead of `setup.py test` ([#71](https://github.com/reanahub/reana-message-broker/issues/71)) ([4cbe67a](https://github.com/reanahub/reana-message-broker/commit/4cbe67ac5d6584a0622049f7da0c04173b341497))
+
 ## [0.9.3](https://github.com/reanahub/reana-message-broker/compare/0.9.2...0.9.3) (2024-03-01)
 
 
diff --git a/Dockerfile b/Dockerfile
index 5c699b1..ad232d5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,5 +26,5 @@ LABEL org.opencontainers.image.title="reana-message-broker"
 LABEL org.opencontainers.image.url="https://github.com/reanahub/reana-message-broker"
 LABEL org.opencontainers.image.vendor="reanahub"
 # x-release-please-start-version
-LABEL org.opencontainers.image.version="0.9.3"
+LABEL org.opencontainers.image.version="0.9.4"
 # x-release-please-end
diff --git a/reana_message_broker/version.py b/reana_message_broker/version.py
index cb530b4..bdbfeda 100644
--- a/reana_message_broker/version.py
+++ b/reana_message_broker/version.py
@@ -14,4 +14,4 @@
 
 from __future__ import absolute_import, print_function
 
-__version__ = "0.9.3"
+__version__ = "0.9.4"