diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 03a5295..79928a2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ permissions:
   contents: read
 
 env:
-  DEVELOPER_DIR: /Applications/Xcode_15.3.app
+  DEVELOPER_DIR: /Applications/Xcode_15.4.app
 
 jobs:
   build:
diff --git a/README.md b/README.md
index b5c5df1..d499d6c 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ Loki（ロキ）は、サ活の記録に特化したアプリです。
 ### 必要条件
 
 - macOS 14.0+
-- Xcode 15.3 (Swift 5.10)
+- Xcode 15.4 (Swift 5.10)
 - Make
 - Mint