diff --git a/personio-personnel-data-api-oa3.yaml b/personio-personnel-data-api-oa3.yaml
index ef8e990..f7ea151 100644
--- a/personio-personnel-data-api-oa3.yaml
+++ b/personio-personnel-data-api-oa3.yaml
@@ -2489,6 +2489,25 @@ components:
               balance:
                 type: number
                 example: 10.5
+              
+    Project:
+      type: object
+      properties:
+        id:
+          type: integer
+          example: 1
+        type:
+          type: string
+          example: "Project"
+        attributes:
+          type: object
+          properties:
+            name:
+              type: string
+              example: "Project name"
+            active:
+              example: true
+              type: boolean
 
     Attendance:
       type: object
@@ -2525,6 +2544,14 @@ components:
             - confirmed
             - pending
             - rejected
+        project:
+          $ref: "#/components/schemas/Project"
+          example:
+            id: 1
+            type: Project
+            attributes:
+              name: "Some project"
+              active: true
 
     AttendanceCreateRequest:
       type: object