diff --git a/monitoring/docker-compose.yaml b/monitoring/docker-compose.yaml
index d8de289..edd3503 100644
--- a/monitoring/docker-compose.yaml
+++ b/monitoring/docker-compose.yaml
@@ -2,7 +2,7 @@ version: "3.3"
 services:
 
   grafana:
-    image: grafana/grafana:7.5.6
+    image: grafana/grafana:${GRAFANA_VERSION}
     restart: unless-stopped
     networks:
       - web
@@ -37,7 +37,7 @@ services:
 
 
   grafanadb:
-    image: postgres:13
+    image: postgres:${POSTGRES_VERSION}
     volumes:
       - ${VOLUMES_PATH}/grafanadb:/var/lib/postgresql/data
     networks:
@@ -52,7 +52,7 @@ services:
 
 
   influxdb:
-    image: influxdb:1.8
+    image: influxdb:${INFLUXDB_VERSION}
     restart: unless-stopped
     networks:
       - web
@@ -78,7 +78,7 @@ services:
   # here starts data collection
 
   telegraf_host:
-    image: telegraf:1.18
+    image: telegraf:${TELEGRAF_VERSION}
     restart: unless-stopped
     environment:
       - HOST_MOUNT_PREFIX=/hostfs
@@ -101,7 +101,7 @@ services:
       - influxdb
 
   telegraf_net:
-    image: telegraf:1.18
+    image: telegraf:${TELEGRAF_VERSION}
     restart: unless-stopped
     env_file:
       - ./.env # set environments into container