diff --git a/conf/config.js b/conf/config.js
index b1d0df9d..e1b6db41 100644
--- a/conf/config.js
+++ b/conf/config.js
@@ -140,7 +140,7 @@ config.iota = {
          * Host where MongoDB is located. If the MongoDB used is a replicaSet, this property will contain a
          * comma-separated list of the instance names or IPs.
          */
-        host: 'localhost',
+        host: 'mongodb',
         /**
          * Port where MongoDB is listening. In the case of a replicaSet, all the instances are supposed to be listening
          * in the same port.
@@ -173,7 +173,7 @@ config.iota = {
      * URL Where the IoT Agent Will listen for incoming updateContext and queryContext requests (for commands and
      * passive attributes). This URL will be sent in the Context Registration requests.
      */
-    providerUrl: 'http://localhost:4041',
+    providerUrl: 'http://iotagent-opcua:4041',
     /**
      * Default maximum expire date for device registrations.
      */
@@ -217,7 +217,7 @@ config.opcua = {
     /**
      * Endpoint where the IoT Agent will listen for an active OPC UA Server.
      */
-    endpoint: 'opc.tcp://localhost:5001/UA/CarServer',
+    endpoint: 'opc.tcp://iotcarsrv:5001/UA/CarServer',
     /**
      * Security Mode to access OPC UA Server.
      */
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 86ff4c27..6c815f11 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -107,7 +107,7 @@ services:
 
   iotcarsrv:
     hostname: iotcarsrv
-    image: iotagent4fiware/opcuacarsrv:latest
+    image: iotagent4fiware/opcuacarsrv:1.3.9
     networks:
       - hostnet
     ports:
diff --git a/lib/configService.js b/lib/configService.js
index d01fe9a2..80a2043d 100644
--- a/lib/configService.js
+++ b/lib/configService.js
@@ -75,14 +75,7 @@ function processEnvironmentVariables() {
         'IOTA_OPCUA_SUBSCRIPTION_REQ_PUBLISHING_INTERVAL',
         'IOTA_OPCUA_SUBSCRIPTION_PRIORITY'
     ];
-    const mappingToolVariables = [
-        'IOTA_OPCUA_MT_POLLING',
-        'IOTA_OPCUA_MT_AGENT_ID',
-        'IOTA_OPCUA_MT_ENTITY_ID',
-        'IOTA_OPCUA_MT_ENTITY_TYPE',
-        'IOTA_OPCUA_MT_NAMESPACE_IGNORE',
-        'IOTA_OPCUA_MT_STORE_OUTPUT'
-    ];
+    const mappingToolVariables = ['IOTA_OPCUA_MT_POLLING', 'IOTA_OPCUA_MT_AGENT_ID', 'IOTA_OPCUA_MT_ENTITY_ID', 'IOTA_OPCUA_MT_ENTITY_TYPE', 'IOTA_OPCUA_MT_NAMESPACE_IGNORE', 'IOTA_OPCUA_MT_STORE_OUTPUT'];
 
     const protectedVariables = ['IOTA_OPCUA_SECURITY_USERNAME', 'IOTA_OPCUA_SECURITY_PASSWORD'];
     // Substitute Docker Secret Variables where set.
@@ -103,9 +96,13 @@ function processEnvironmentVariables() {
     if (anyIsSet(iotaVariables)) {
         config.iota = {
             contextBroker: {},
-            server : {},
+            server: {},
             deviceRegistry: {},
-            mongodb: {}
+            mongodb: {},
+            types: {},
+            contexts: [],
+            contextSubscriptions: [],
+            events: []
         };
         logger.info('Config.iota erased', config.iota);
     }
@@ -132,7 +129,7 @@ function processEnvironmentVariables() {
     if (process.env.IOTA_CB_PORT) {
         config.iota.contextBroker.port = process.env.IOTA_CB_PORT;
     }
-    
+
     if (process.env.IOTA_CB_NGSIVERSION) {
         config.iota.contextBroker.ngsiVersion = process.env.IOTA_CB_NGSIVERSION;
     }