diff --git a/examples/docker-compose-grafana-prometheus/docker-compose.yml b/examples/docker-compose-grafana-prometheus/docker-compose.yml
index 289374bd..74d45348 100644
--- a/examples/docker-compose-grafana-prometheus/docker-compose.yml
+++ b/examples/docker-compose-grafana-prometheus/docker-compose.yml
@@ -1,12 +1,11 @@
-version: '3.7'
-
+version: "3.9"
 services:
   gatus:
     container_name: gatus
     image: twinproduction/gatus
     restart: always
     ports:
-      - 8080:8080
+      - "8080:8080"
     volumes:
       - ./config.yaml:/config/config.yaml
     networks:
@@ -18,7 +17,7 @@ services:
     restart: always
     command: --config.file=/etc/prometheus/prometheus.yml
     ports:
-      - 9090:9090
+      - "9090:9090"
     volumes:
       - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
     networks:
@@ -31,7 +30,7 @@ services:
     environment:
       GF_SECURITY_ADMIN_PASSWORD: secret
     ports:
-      - 3000:3000
+      - "3000:3000"
     volumes:
       - ./grafana/grafana.ini/:/etc/grafana/grafana.ini:ro
       - ./grafana/provisioning/:/etc/grafana/provisioning/:ro
diff --git a/examples/docker-compose-mattermost/docker-compose.yml b/examples/docker-compose-mattermost/docker-compose.yml
index 19b75629..f3f9d630 100644
--- a/examples/docker-compose-mattermost/docker-compose.yml
+++ b/examples/docker-compose-mattermost/docker-compose.yml
@@ -1,11 +1,10 @@
-version: "3.8"
-
+version: "3.9"
 services:
   gatus:
     container_name: gatus
     image: twinproduction/gatus:latest
     ports:
-      - 8080:8080
+      - "8080:8080"
     volumes:
       - ./config.yaml:/config/config.yaml
     networks:
@@ -15,7 +14,7 @@ services:
     container_name: mattermost
     image: mattermost/mattermost-preview:5.26.0
     ports:
-      - 8065:8065
+      - "8065:8065"
     networks:
       - default
 
diff --git a/examples/docker-compose-postgres-storage/docker-compose.yml b/examples/docker-compose-postgres-storage/docker-compose.yml
index 2fa775ae..04499b72 100644
--- a/examples/docker-compose-postgres-storage/docker-compose.yml
+++ b/examples/docker-compose-postgres-storage/docker-compose.yml
@@ -15,7 +15,7 @@ services:
     image: twinproduction/gatus:latest
     restart: always
     ports:
-      - 8080:8080
+      - "8080:8080"
     volumes:
       - ./config.yaml:/config/config.yaml
     networks:
diff --git a/examples/docker-compose-sqlite-storage/docker-compose.yml b/examples/docker-compose-sqlite-storage/docker-compose.yml
index 97b4c8e3..df2f01e6 100644
--- a/examples/docker-compose-sqlite-storage/docker-compose.yml
+++ b/examples/docker-compose-sqlite-storage/docker-compose.yml
@@ -1,9 +1,9 @@
-version: "3.8"
+version: "3.9"
 services:
   gatus:
     image: twinproduction/gatus:latest
     ports:
-      - 8080:8080
+      - "8080:8080"
     volumes:
       - ./config.yaml:/config/config.yaml
       - ./data:/data/
\ No newline at end of file