diff --git a/CHANGELOG.mdx b/CHANGELOG.mdx
index 7aa461b5b..71a59ef11 100644
--- a/CHANGELOG.mdx
+++ b/CHANGELOG.mdx
@@ -17,6 +17,13 @@ https://github.com/RasaHQ/rasa/tree/main/changelog/ . -->
 
 <!-- TOWNCRIER -->
 
+## [3.5.1] - 2023-04-11
+                       
+Rasa_Sdk 3.5.1 (2023-04-11)                            
+### Miscellaneous internal changes
+- [#959](https://github.com/rasahq/rasa-sdk/issues/959)
+
+
 ## [3.5.0] - 2023-03-17
                        
 Rasa_Sdk 3.5.0 (2023-03-17)                             
diff --git a/poetry.lock b/poetry.lock
index e4bc74822..58c4fd5b5 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -760,7 +760,7 @@ testing = ["flake8 (<5)", "func-timeout", "jaraco.functools", "jaraco.itertools"
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<3.11"
-content-hash = "6e7ffb22aff1c2ef591119311ce5adb91f12f35c669b71281ba5f4f35dbe4f2c"
+content-hash = "4d57bc1febacaaa471f551f2bf7cc153743c22c540dab4ef394452304090c3c1"
 
 [metadata.files]
 aiofiles = [
diff --git a/pyproject.toml b/pyproject.toml
index a4055aef2..2a263ddaf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ exclude = "((.eggs | .git | .mypy_cache | .pytest_cache | build | dist))"
 
 [tool.poetry]
 name = "rasa-sdk"
-version = "3.5.0"
+version = "3.5.1"
 description = "Open source machine learning framework to automate text- and voice-based conversations: NLU, dialogue management, connect to Slack, Facebook, and more - Create chatbots and voice assistants"
 authors = ["Rasa Technologies GmbH <hi@rasa.com>"]
 maintainers = ["Tom Bocklisch <tom@rasa.com>"]
@@ -90,6 +90,7 @@ typing-extensions = ">=4.1.1,<5.0.0"
 Sanic-Cors = "^2.0.0"
 prompt-toolkit = "^3.0,<3.0.29"
 "ruamel.yaml" = ">=0.16.5,<0.18.0"
+websockets = ">=10.0,<11.0"
 
 [tool.poetry.dev-dependencies]
 pytest-cov = "^4.0.0"
diff --git a/rasa_sdk/version.py b/rasa_sdk/version.py
index c45220921..e3c56f721 100644
--- a/rasa_sdk/version.py
+++ b/rasa_sdk/version.py
@@ -1,3 +1,3 @@
 # this file will automatically be changed,
 # do not add anything but the version number here!
-__version__ = "3.5.0"
+__version__ = "3.5.1"