diff --git a/realestate-lab/app/db.py b/realestate-lab/app/db.py
index 6465b85..2bba4d2 100644
--- a/realestate-lab/app/db.py
+++ b/realestate-lab/app/db.py
@@ -11,7 +11,7 @@ DB_PATH = "/app/data/realestate.db"
 
 
 def _conn():
-    c = sqlite3.connect(DB_PATH)
+    c = sqlite3.connect(DB_PATH, timeout=10)
     c.row_factory = sqlite3.Row
     c.execute("PRAGMA journal_mode=WAL;")
     c.execute("PRAGMA foreign_keys=ON;")
diff --git a/realestate-lab/app/main.py b/realestate-lab/app/main.py
index f2292e6..4066239 100644
--- a/realestate-lab/app/main.py
+++ b/realestate-lab/app/main.py
@@ -159,7 +159,11 @@ def api_matches(page: int = Query(1, ge=1), size: int = Query(20, ge=1, le=100))
 
 @app.post("/api/realestate/matches/refresh")
 def api_matches_refresh():
-    run_matching()
+    try:
+        run_matching()
+    except Exception as e:
+        logger.exception("매칭 실행 실패")
+        raise HTTPException(status_code=500, detail=str(e))
     return {"ok": True}
 
 
diff --git a/realestate-lab/app/matcher.py b/realestate-lab/app/matcher.py
index bfefd4c..e1cc6f6 100644
--- a/realestate-lab/app/matcher.py
+++ b/realestate-lab/app/matcher.py
@@ -2,7 +2,7 @@ import json
 import logging
 from typing import Dict, Any, List
 
-from .db import get_profile, _conn
+from .db import _conn, _profile_row_to_dict
 
 logger = logging.getLogger("realestate-lab")
 
@@ -115,13 +115,16 @@ def _compute_score(
 
 
 def run_matching():
-    """프로필 기반 매칭을 실행하여 결과를 저장한다."""
-    profile = get_profile()
-    if not profile:
-        logger.info("프로필 미설정 — 매칭 건너뜀")
-        return
-
+    """프로필 기반 매칭을 실행하여 결과를 저장한다.
+    단일 connection으로 프로필 조회 + 매칭 + 저장을 처리하여 DB lock 방지.
+    """
     with _conn() as conn:
+        profile_row = conn.execute("SELECT * FROM user_profile WHERE id = 1").fetchone()
+        if not profile_row:
+            logger.info("프로필 미설정 — 매칭 건너뜀")
+            return
+        profile = _profile_row_to_dict(profile_row)
+
         anns = conn.execute(
             "SELECT * FROM announcements WHERE status IN ('청약예정', '청약중')"
         ).fetchall()