diff --git a/.gitignore b/.gitignore
index 74689b7d4..cafc064dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,4 +35,5 @@
 
 /test-framework/node_modules
 /test-framework/.yalc
+/test-framework/dist
 /.tmp
diff --git a/package.json b/package.json
index 0fbdb4fea..080286781 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
   },
   "dependencies": {
     "@types/jsonld": "^1.5.0",
-    "json2typescript": "^1.2.3",
+    "json2typescript": "~1.2.3",
     "jsonld": "^1.8.0",
     "rxjs": "~6.4.0"
   }
diff --git a/src/index.ts b/src/index.ts
index 73e16e060..1a923d068 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -127,7 +127,7 @@ export { CreateListValue } from "./models/v2/resources/values/create/create-list
 export { CreateTextValueAsString, CreateTextValueAsXml } from "./models/v2/resources/values/create/create-text-value";
 export { CreateUriValue } from "./models/v2/resources/values/create/create-uri-value";
 export { CreateTimeValue } from "./models/v2/resources/values/create/create-time-value";
-export { CreateGeonameValue } from './models/v2/resources/values/create/create-geoname-value';
+export { CreateGeonameValue } from "./models/v2/resources/values/create/create-geoname-value";
 
 export { ListNodeV2 } from "./models/v2/lists/list-node-v2";
 
diff --git a/src/models/v2/resources/values/create/create-interval-value.ts b/src/models/v2/resources/values/create/create-interval-value.ts
index 79d2c7e20..6077e5d7c 100644
--- a/src/models/v2/resources/values/create/create-interval-value.ts
+++ b/src/models/v2/resources/values/create/create-interval-value.ts
@@ -1,9 +1,10 @@
-import { JsonProperty } from "json2typescript";
+import { JsonObject, JsonProperty } from "json2typescript";
 import { Constants } from "../../../Constants";
 import { DecimalConverter } from "../../../custom-converters/decimal-converter";
 import { IBaseIntervalValue } from "../type-specific-interfaces/base-interval-value";
 import { CreateValue } from "./create-value";
 
+@JsonObject("CreateIntervalValue")
 export class CreateIntervalValue extends CreateValue implements IBaseIntervalValue {
 
     @JsonProperty(Constants.IntervalValueHasStart, DecimalConverter)
diff --git a/test-framework/yalc.lock b/test-framework/yalc.lock
index a360950c4..7f4b2b697 100644
--- a/test-framework/yalc.lock
+++ b/test-framework/yalc.lock
@@ -2,7 +2,7 @@
   "version": "v1",
   "packages": {
     "@knora/api": {
-      "signature": "95f3f3ae3dd4d1cd18ce448b73f1cc98",
+      "signature": "ab66976f6d0f1b87bf6ad06f3f314072",
       "file": true
     }
   }