diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 21ea79553..6dc8db7e9 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -100,7 +100,7 @@ jobs:
             cibw_arch: arm64_iphoneos
           - name: "iOS arm64 simulator"
             platform: ios
-            os: macos-latest
+            os: macos-14
             cibw_arch: arm64_iphonesimulator
           - name: "iOS x86_64 simulator"
             platform: ios
diff --git a/src/PIL/_version.py b/src/PIL/_version.py
index 6a3c01f26..41cb17a36 100644
--- a/src/PIL/_version.py
+++ b/src/PIL/_version.py
@@ -1,4 +1,4 @@
 # Master version for Pillow
 from __future__ import annotations
 
-__version__ = "12.0.0.dev0"
+__version__ = "12.1.0.dev0"