diff --git a/gitea/docker-compose.yml b/gitea/docker-compose.yml
index 07c6e42..592eccb 100644
--- a/gitea/docker-compose.yml
+++ b/gitea/docker-compose.yml
@@ -11,6 +11,8 @@ services:
       - ${APPDATA_PATH}/gitea/db:/var/lib/postgresql/data
     ports:
       - ${DB_PORT}:5432
+    networks:
+      - backend
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d ${POSTGRES_DB} -U ${POSTGRES_USER}"]
       interval: 10s
@@ -40,3 +42,12 @@ services:
     ports:
       - ${SERVER_PORT}:3000
       - ${SSH_PORT}:22
+    networks:
+      - frontend
+      - backend
+
+networks:
+  frontend:
+    external: true
+  backend:
+    external: true
diff --git a/opengist/docker-compose.yml b/opengist/docker-compose.yml
index 8439ee3..81e59f3 100644
--- a/opengist/docker-compose.yml
+++ b/opengist/docker-compose.yml
@@ -11,6 +11,8 @@ services:
       - ${APPDATA_PATH}/opengist/db:/var/lib/postgresql/data
     ports:
       - ${DB_PORT}:5432
+    networks:
+      - backend
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -d ${POSTGRES_DB} -U ${POSTGRES_USER}"]
       interval: 10s
@@ -44,3 +46,13 @@ services:
     ports:
       - ${SERVER_PORT}:6157
       - 2222:2222
+    networks:
+      - frontend
+      - backend
+
+networks:
+  frontend:
+    external: true
+  backend:
+    external: true
+