diff --git a/scripts/db-init.js b/scripts/db-init.js
index 53a6eda..f844fab 100644
--- a/scripts/db-init.js
+++ b/scripts/db-init.js
@@ -21,10 +21,10 @@ async function main() {
         console.error("[DB Init] Error reading .db-config.json", e);
     }
 
-    // Force environment variable if present (for Docker/DevOps consistency)
-    if (process.env.DATABASE_URL) {
+    // Use environment variable as default IF NOT already loaded from config
+    if (!connectionString && process.env.DATABASE_URL) {
         connectionString = process.env.DATABASE_URL;
-        console.log("[DB Init] Using environment variable DATABASE_URL (Priority).");
+        console.log("[DB Init] Using environment variable DATABASE_URL as fallback.");
     }
 
     if (!connectionString) {
diff --git a/src/db/index.ts b/src/db/index.ts
index 0c5266e..b7d9ff4 100644
--- a/src/db/index.ts
+++ b/src/db/index.ts
@@ -34,10 +34,10 @@ export function getDb() {
         console.error("[DB] Error reading config file:", err);
     }
 
-    // IMPORTANT: Environment variable MUST take precedence in container environments
-    if (process.env.DATABASE_URL) {
+    // Use environment variable as fallback if no config is found
+    if (!connectionString && process.env.DATABASE_URL) {
         connectionString = process.env.DATABASE_URL;
-        console.log("[DB] Using environment variable (優先度高).");
+        console.log("[DB] Using environment variable as fallback.");
     }
 
     console.log("[DB] Initializing connection with:", maskUrl(connectionString));