diff --git a/.env b/.env
index 4d1ccc2..03a0e20 100644
--- a/.env
+++ b/.env
@@ -4,7 +4,7 @@ EXPOSED_PORT=1026
 
 # Orion variables
 ORION_PORT=1027
-ORION_VERSION=3.8.1
+ORION_VERSION=4.0.0
 
 # Orion variables
 ORION_LD_PORT=1026
diff --git a/README.md b/README.md
index a3935fd..77c351f 100644
--- a/README.md
+++ b/README.md
@@ -256,7 +256,7 @@ orion:
         - default
     ports:
         - "1027:1026" # localhost:1026
-    command: -dbhost mongo-db2 -logLevel DEBUG
+    command: -dbURI mongodb://mongo-db2 -logLevel DEBUG
     healthcheck:
         test: curl --fail -s http://orion2:1026/version || exit 1
 ```
diff --git a/docker-compose/common.yml b/docker-compose/common.yml
index 7e1350e..e0f4185 100644
--- a/docker-compose/common.yml
+++ b/docker-compose/common.yml
@@ -169,7 +169,7 @@ services:
       - "${ORION_PORT}"
     ports:
       - "${ORION_PORT}:1026" # localhost:1026
-    command: -dbhost mongo-db2 -logLevel DEBUG
+    command: -dbURI mongodb://mongo-db2 -logLevel DEBUG
     healthcheck:
       test: curl --fail -s http://orion2:1026/version || exit 1
       interval: 5s
diff --git a/docker-compose/orion-ld.yml b/docker-compose/orion-ld.yml
index 18b1a8a..017b6d7 100644
--- a/docker-compose/orion-ld.yml
+++ b/docker-compose/orion-ld.yml
@@ -34,7 +34,7 @@ services:
     command: -dbhost mongo-db -logLevel DEBUG -forwarding -experimental -wip entityMaps
     healthcheck:
       test: curl --fail -s http://orion:${ORION_LD_PORT}/version || exit 1
-      interval: 60s
+      interval: 5s
      
   # Tutorial connects to the Orion-LD Broker
   tutorial: