diff --git a/backend/Dockerfile b/backend/Dockerfile
index a14ad00..6ac8443 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -12,8 +12,10 @@ RUN groupadd -r pounce && useradd -r -g pounce pounce
 WORKDIR /app
 
 # Install system dependencies
+# dnsutils provides 'dig' for DNS zone transfers (AXFR)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
+    dnsutils \
     && rm -rf /var/lib/apt/lists/*
 
 # Install Python dependencies
diff --git a/backend/app/api/admin.py b/backend/app/api/admin.py
index 848f60d..810f93f 100644
--- a/backend/app/api/admin.py
+++ b/backend/app/api/admin.py
@@ -1743,11 +1743,12 @@ async def trigger_switch_sync(
     from app.services.zone_file import ZoneFileService
     
     async def run_sync():
-        zf = ZoneFileService()
-        from app.database import async_session_maker
-        async with async_session_maker() as session:
-            result = await zf.sync_all_zones(session)
-            return result
+        from app.database import AsyncSessionLocal
+        async with AsyncSessionLocal() as session:
+            zf = ZoneFileService()
+            for tld in ["ch", "li"]:
+                await zf.run_daily_sync(session, tld)
+            return {"status": "complete"}
     
     background_tasks.add_task(run_sync)
     
@@ -1770,9 +1771,9 @@ async def trigger_czds_sync(
     from app.services.czds_client import CZDSClient
     
     async def run_sync():
-        client = CZDSClient()
-        from app.database import async_session_maker
-        async with async_session_maker() as session:
+        from app.database import AsyncSessionLocal
+        async with AsyncSessionLocal() as session:
+            client = CZDSClient()
             result = await client.sync_all_zones(session)
             return result