diff --git a/common/src/interfaces/assignment.ts b/common/src/interfaces/assignment.ts
index 3e7e6a5d..fb7dfbf0 100644
--- a/common/src/interfaces/assignment.ts
+++ b/common/src/interfaces/assignment.ts
@@ -9,3 +9,8 @@ export interface AssignmentDTO {
     language: string;
     groups: GroupDTO[] | string[][];
 }
+
+export interface AssignmentDTOId {
+    id: number;
+    within: string;
+}
diff --git a/common/src/interfaces/group.ts b/common/src/interfaces/group.ts
index 742f2c75..a9f68398 100644
--- a/common/src/interfaces/group.ts
+++ b/common/src/interfaces/group.ts
@@ -8,3 +8,9 @@ export interface GroupDTO {
     groupNumber: number;
     members: string[] | StudentDTO[];
 }
+
+export interface GroupDTOId {
+    class: string,
+    assignment: number,
+    groupNumber: number,
+}
\ No newline at end of file