diff --git a/docker-compose.yml b/docker-compose.yml
index 3bedfd5..f1cd3ae 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -22,6 +22,26 @@ services:
     networks:
       - memento-network
 
+  # ============================================
+  # Redis - Cache & Quota Tracking
+  # ============================================
+  redis:
+    image: redis:7-alpine
+    container_name: memento-redis
+    restart: unless-stopped
+    command: redis-server --maxmemory 128mb --maxmemory-policy allkeys-lru
+    volumes:
+      - redis-data:/data
+    ports:
+      - "127.0.0.1:6379:6379"
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    networks:
+      - memento-network
+
   # ============================================
   # memento-note - Next.js Web Application
   # ============================================
@@ -37,8 +57,8 @@ services:
     ports:
       - "3000:3000"
     environment:
-      # DATABASE_URL is auto-constructed from PostgreSQL credentials (not in .env.docker)
       - DATABASE_URL=postgresql://${POSTGRES_USER:-memento}:${POSTGRES_PASSWORD:-memento}@postgres:5432/${POSTGRES_DB:-memento}
+      - REDIS_URL=redis://redis:6379
       - NODE_ENV=production
       - NEXT_TELEMETRY_DISABLED=1
       # ADMIN_EMAIL comes from .env.docker via env_file directive above
@@ -48,6 +68,8 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
+      redis:
+        condition: service_healthy
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "node", "-e", "require('http').get('http://localhost:3000/',r=>process.exit(r.statusCode<500?0:1)).on('error',()=>process.exit(1))"]
@@ -138,6 +160,8 @@ services:
 volumes:
   postgres-data:
     driver: local
+  redis-data:
+    driver: local
   uploads-data:
     driver: local
   backup-data: