diff --git a/pyproject.toml b/pyproject.toml
index e12bbeae..efd35260 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "temporalio"
-version = "1.8.0"
+version = "1.9.0"
 description = "Temporal.io Python SDK"
 license = "MIT"
 authors = ["Temporal Technologies Inc <sdk@temporal.io>"]
diff --git a/temporalio/service.py b/temporalio/service.py
index 9c7cc4a5..441f6d1f 100644
--- a/temporalio/service.py
+++ b/temporalio/service.py
@@ -26,7 +26,7 @@
 import temporalio.exceptions
 import temporalio.runtime
 
-__version__ = "1.8.0"
+__version__ = "1.9.0"
 
 ServiceRequest = TypeVar("ServiceRequest", bound=google.protobuf.message.Message)
 ServiceResponse = TypeVar("ServiceResponse", bound=google.protobuf.message.Message)