diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dc76aa7..1d32fa1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,7 @@ jobs:
     permissions:
       contents: read
       id-token: write
-    runs-on: depot-ubuntu-24.04
+    runs-on: ${{ github.repository == 'stainless-sdks/replicate-client-python' && 'depot-ubuntu-24.04' || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v4
 
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 376f5f8..d700ccd 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.0.0-alpha.20"
+  ".": "2.0.0-alpha.21"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b579ca..71ae0d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## 2.0.0-alpha.21 (2025-08-26)
+
+Full Changelog: [v2.0.0-alpha.20...v2.0.0-alpha.21](https://github.com/replicate/replicate-python-stainless/compare/v2.0.0-alpha.20...v2.0.0-alpha.21)
+
+### Bug Fixes
+
+* avoid newer type syntax ([7a3be3b](https://github.com/replicate/replicate-python-stainless/commit/7a3be3bb9ec3b1b2476b394fe9733ff0726d3fd0))
+
+
+### Chores
+
+* **internal:** change ci workflow machines ([71bfc70](https://github.com/replicate/replicate-python-stainless/commit/71bfc705832f9fd1d8a34f2944e2a3cd68788c81))
+* **internal:** update pyright exclude list ([6906d75](https://github.com/replicate/replicate-python-stainless/commit/6906d752450d3081f63ebd14db74a52b4c7eaf37))
+
 ## 2.0.0-alpha.20 (2025-08-25)
 
 Full Changelog: [v2.0.0-alpha.19...v2.0.0-alpha.20](https://github.com/replicate/replicate-python-stainless/compare/v2.0.0-alpha.19...v2.0.0-alpha.20)
diff --git a/pyproject.toml b/pyproject.toml
index 914c36a..a19c570 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "replicate"
-version = "2.0.0-alpha.20"
+version = "2.0.0-alpha.21"
 description = "The official Python library for the replicate API"
 dynamic = ["readme"]
 license = "Apache-2.0"
@@ -149,6 +149,7 @@ exclude = [
     "_dev",
     ".venv",
     ".nox",
+    ".git",
 ]
 
 reportImplicitOverride = true
diff --git a/src/replicate/_models.py b/src/replicate/_models.py
index b8387ce..92f7c10 100644
--- a/src/replicate/_models.py
+++ b/src/replicate/_models.py
@@ -304,7 +304,7 @@ def model_dump(
                 exclude_none=exclude_none,
             )
 
-            return cast(dict[str, Any], json_safe(dumped)) if mode == "json" else dumped
+            return cast("dict[str, Any]", json_safe(dumped)) if mode == "json" else dumped
 
         @override
         def model_dump_json(
diff --git a/src/replicate/_version.py b/src/replicate/_version.py
index c02adf7..06fdf6e 100644
--- a/src/replicate/_version.py
+++ b/src/replicate/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "replicate"
-__version__ = "2.0.0-alpha.20"  # x-release-please-version
+__version__ = "2.0.0-alpha.21"  # x-release-please-version