diff --git a/.gitignore b/.gitignore
index 25bfe7d..7a7f664 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,5 @@ rna/nupack-4.0.2.0.zip
 nupack/vendor/nupack-4.0.2.0/source/
 nupack/vendor/nupack-4.0.2.0/package/*.whl
 !nupack/vendor/nupack-4.0.2.0/package/nupack-4.0.2.0-cp312-cp312-linux_x86_64.whl
+# Runtime state mounted from Docker containers.
+runtime/redis/
diff --git a/README.md b/README.md
index 5e48d1a..4f61554 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,11 @@ The service listens on port `18765`. You can later reverse proxy `np.lihato.icu`
 - `POST /api/jobs`
 - `GET /api/jobs/<job_id>`
 
+
+## Persistent Shares
+
+Shared result links are stored in Redis when `NP_REDIS_URL` is enabled. The compose file maps Redis data to `./runtime/redis` and enables AOF/RDB persistence, so shares survive container recreation and service restarts. Back up or migrate `./runtime/redis` if you move the deployment.
+
 ## Notes
 
 - `tube` mode supports strand concentrations and `SetSpec(max_size=...)`.
diff --git a/docker-compose.yml b/docker-compose.yml
index a27f57a..aef86f8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,10 +4,12 @@ services:
     container_name: np-redis
     restart: always
     mem_limit: 2g
-    command: ["redis-server", "--save", "", "--appendonly", "no"]
+    command: ["redis-server", "--appendonly", "yes", "--appendfsync", "everysec", "--save", "60", "1"]
+    volumes:
+      - ./runtime/redis:/data
 
   np-replica:
-    image: np-app:v4.2
+    image: np-app:v4.5
     build:
       context: .
       dockerfile: Dockerfile
@@ -17,7 +19,7 @@ services:
     depends_on:
       - redis
     ports:
-      - "18765:18765"
+      - "100.64.0.2:18765:18765"
     environment:
       NP_HOST: 0.0.0.0
       NP_PORT: 18765
@@ -35,7 +37,7 @@ services:
       GOTO_NUM_THREADS: 4
 
   np-worker:
-    image: np-app:v4.2
+    image: np-app:v4.5
     container_name: np-worker
     restart: always
     mem_limit: 56g