diff --git a/changelog/1128.misc.md b/changelog/1128.misc.md
index c759bc6d..e2751318 100644
--- a/changelog/1128.misc.md
+++ b/changelog/1128.misc.md
@@ -1,2 +1,2 @@
 Update ruff to 0.3.7.
-Switch to ruff as code formatter.
+Switch to ruff as code formatter.
\ No newline at end of file
diff --git a/changelog/1135.misc.md b/changelog/1135.misc.md
index e4d7f900..741d7216 100644
--- a/changelog/1135.misc.md
+++ b/changelog/1135.misc.md
@@ -1,2 +1,2 @@
 Stringify `None` values for `message_id` and `sender_id` tracing tags to fix the
-`opentelemetry` warning about invalid type `NoneType` for these tags.
+`opentelemetry` warning about invalid type `NoneType` for these tags.
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 42f64648..f239e182 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry]
 name = "rasa-sdk"
-version = "3.9.1"
+version = "3.10.0.dev1"
 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>",]
diff --git a/rasa_sdk/version.py b/rasa_sdk/version.py
index cb161a1a..00fc6de0 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__ = "3.9.1"
+__version__ = "3.10.0.dev1"