diff --git a/api/src/engine/engine.resolver.ts b/api/src/engine/engine.resolver.ts
index 7156789427ab82d2ea928a5703cee5dea46e69fc..e66bc13da0d1c7e211f35a0decff0a417b97c6e2 100644
--- a/api/src/engine/engine.resolver.ts
+++ b/api/src/engine/engine.resolver.ts
@@ -10,11 +10,11 @@ export class EngineResolver {
 
     @Query(() => Domain)
     async hello() {
-        let dummy : Domain = {  
+        let dummy: Domain = {
             id: "test",
             label: "test",
             description: "test",
-            groups:[],
+            groups: [],
             variables: [],
             datasets: []
         }
diff --git a/api/src/engine/models/domain.model.ts b/api/src/engine/models/domain.model.ts
index bffe59e04ed5cf411ed0e00c71751a65c6339aba..b1f3ccac521fdca1707075015eca274e62d60676 100644
--- a/api/src/engine/models/domain.model.ts
+++ b/api/src/engine/models/domain.model.ts
@@ -3,7 +3,7 @@ import { Category } from "./category.model";
 import { Group } from "./group.model";
 
 @ObjectType()
-export class Domain extends Group{
+export class Domain extends Group {
     @Field(type => [Category])
     datasets: Category[];
 }
\ No newline at end of file
diff --git a/api/src/engine/models/group.model.ts b/api/src/engine/models/group.model.ts
index 94c33069f7bac6d2f51291508c4ef3159b393c76..dd30609f59c1a2dac275f214b0bbe1b3d18a3da0 100644
--- a/api/src/engine/models/group.model.ts
+++ b/api/src/engine/models/group.model.ts
@@ -9,7 +9,7 @@ export class Group {
     @Field()
     label: string;
 
-    @Field({ nullable: true})
+    @Field({ nullable: true })
     description?: string;
 
     @Field(type => [Group])
diff --git a/api/src/engine/models/variable.model.ts b/api/src/engine/models/variable.model.ts
index 5676ec8447a7dff207c248fcd08f5502e0182cb0..dcc9a6f4e887b2f5e2f4fcf3c7c3cdcaa2f3b0e3 100644
--- a/api/src/engine/models/variable.model.ts
+++ b/api/src/engine/models/variable.model.ts
@@ -13,7 +13,7 @@ export class Variable {
     @Field()
     type: string;
 
-    @Field({ nullable: true})
+    @Field({ nullable: true })
     description?: string;
 
     @Field(type => [Category])