diff --git a/api/src/engine/engine.constants.ts b/api/src/engine/engine.constants.ts
index 3c9ae327491d37456964f9ce2cba8a7f04ecccf5..641ceed91bb4a29953fc558479f5b667fd112808 100644
--- a/api/src/engine/engine.constants.ts
+++ b/api/src/engine/engine.constants.ts
@@ -1,3 +1,4 @@
 export const ENGINE_MODULE_OPTIONS = 'EngineModuleOption';
 export const ENGINE_SERVICE = 'EngineService';
 export const ENGINE_SKIP_TOS = 'TOS_SKIP';
+export const ENGINE_ONTOLOGY_URL = 'ONTOLOGY_URL';
diff --git a/api/src/engine/engine.resolver.ts b/api/src/engine/engine.resolver.ts
index 6260111702f3268881409f80f5db91cc197c1cba..d5acde6a200cda20f7105e610713c3cf407fac79 100644
--- a/api/src/engine/engine.resolver.ts
+++ b/api/src/engine/engine.resolver.ts
@@ -6,6 +6,7 @@ import { GQLRequest } from '../common/decorators/gql-request.decoractor';
 import { Md5 } from 'ts-md5';
 import {
   ENGINE_MODULE_OPTIONS,
+  ENGINE_ONTOLOGY_URL,
   ENGINE_SERVICE,
   ENGINE_SKIP_TOS,
 } from './engine.constants';
@@ -55,6 +56,7 @@ export class EngineResolver {
         true,
       ),
       matomo,
+      ontologyUrl: this.configSerivce.get(ENGINE_ONTOLOGY_URL),
     };
 
     const version = Md5.hashStr(JSON.stringify(data));
diff --git a/api/src/engine/models/configuration.model.ts b/api/src/engine/models/configuration.model.ts
index 6ffe779cc55962c0dc0c20fd0e3d47c9e4d73348..9471881a191b9bdbc33a8d181487f6888d453fc3 100644
--- a/api/src/engine/models/configuration.model.ts
+++ b/api/src/engine/models/configuration.model.ts
@@ -25,4 +25,7 @@ export class Configuration {
 
   @Field(() => Matomo, { nullable: true })
   matomo?: Matomo;
+
+  @Field({ nullable: true })
+  ontologyUrl?: string;
 }
diff --git a/api/src/schema.gql b/api/src/schema.gql
index b93416b7bc8ea2912afd24c7382492d42b6c3809..8265eb01a39457cb2d9420de4625a1b937ac26d7 100644
--- a/api/src/schema.gql
+++ b/api/src/schema.gql
@@ -40,6 +40,7 @@ type Configuration {
   skipTos: Boolean
   enableSSO: Boolean
   matomo: Matomo
+  ontologyUrl: String
 }
 
 type Dataset {
diff --git a/docs/for-developers/configuration/gateway.md b/docs/for-developers/configuration/gateway.md
index 2b16dacfcbdfbc415f9091c3086a000032787d21..7f879ca3369f383b0f2b26fbacc31d35d889258b 100644
--- a/docs/for-developers/configuration/gateway.md
+++ b/docs/for-developers/configuration/gateway.md
@@ -18,6 +18,7 @@ description: >-
 | GATEWAY\_PORT      | number  | 8081                            | Indicate the port that should be used by the gateway                                        |
 | NODE\_ENV          | string  | dev                             | Value can be `prod` or `dev`                                                                |
 | BASE\_URL\_CONTEXT | string  | null                            | Define context of the gateway. E.g. `api` if the api is under `http://127.0.0.1/api/`       |
+| ONTOLOGY\_URL      | string  | null                            | Define ontology's url                                                                       |
 
 #### Authentication