diff --git a/src/app.py b/src/app.py
index 3c799bf..abb9bc0 100644
--- a/src/app.py
+++ b/src/app.py
@@ -8,6 +8,7 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from src.routers import emoji
+from src.common.config import settings
 
 # ログ設定
 logging.basicConfig(
@@ -16,19 +17,19 @@
 logger = logging.getLogger(__name__)
 
 app = FastAPI(
-    title="Emoji API",
-    description="API for generating custom emoji images with text.",
-    version="1.0.0",
+    title=settings.PROJECT_NAME,
+    description=settings.DESCRIPTION,
+    version=settings.PROJECT_VERSION,
 )
 """FastAPI application instance."""
 
 # CORS設定
 app.add_middleware(
     CORSMiddleware,
-    allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
+    allow_origins=settings.CORS_ORIGINS,
+    allow_credentials=settings.CORS_ALLOW_CREDENTIALS,
+    allow_methods=settings.CORS_ALLOW_METHODS,
+    allow_headers=settings.CORS_ALLOW_HEADERS,
 )
 
 # ルーターの登録
diff --git a/src/common/config.py b/src/common/config.py
new file mode 100644
index 0000000..94b4a3a
--- /dev/null
+++ b/src/common/config.py
@@ -0,0 +1,15 @@
+from typing import List
+
+class AppSettings:
+    """Application settings."""
+    PROJECT_NAME: str = "Emoji API"
+    PROJECT_VERSION: str = "1.0.0"
+    DESCRIPTION: str = "API for generating custom emoji images with text."
+
+    # CORS settings
+    CORS_ORIGINS: List[str] = ["*"]
+    CORS_ALLOW_CREDENTIALS: bool = True
+    CORS_ALLOW_METHODS: List[str] = ["*"]
+    CORS_ALLOW_HEADERS: List[str] = ["*"]
+
+settings = AppSettings()