diff --git a/spec/schemas/application-schema.yml b/spec/schemas/application-schema.yml
index d308999a95e07823e416b33ff4ae8152ac348240..fd22b464fbde9323a9e89f0f64ee7249d067e1e7 100644
--- a/spec/schemas/application-schema.yml
+++ b/spec/schemas/application-schema.yml
@@ -3,7 +3,6 @@ description: 'Referenz auf ein Schema, das die Struktur der Fachdaten eines Antr
 type: object
 required:
   - schemaURI
-additionalProperties: false
 properties:
   schemaURI:
     type: string
diff --git a/spec/schemas/contact-information.yml b/spec/schemas/contact-information.yml
index 0b3a10c0f947ec058f43acc1d631e5de3f62a580..5e0a0fc03c6582dbcb4288d9cc1d3a9d4d1f1810 100644
--- a/spec/schemas/contact-information.yml
+++ b/spec/schemas/contact-information.yml
@@ -1,7 +1,6 @@
 title: Kontakt
 description: Angaben zum Ansprechpartner des Zustellpunktes
 type: object
-additionalProperties: false
 required:
   - legalName
   - address
diff --git a/spec/schemas/create-application.yml b/spec/schemas/create-application.yml
index 7e141704fbe22dfbd559fdbf5e8b6cfa379a2370..80e71a581fa203a59636efa3e8579d5c41d609e9 100644
--- a/spec/schemas/create-application.yml
+++ b/spec/schemas/create-application.yml
@@ -1,7 +1,6 @@
 title: Objekt zum Erzeugen eines Antrags
 description: 'Metadaten eines Antrags noch ohne ID, zum Anlegen eines neuen Antrags.'
 type: object
-additionalProperties: false
 required:
   - destinationId
   - announcedContentStructure
diff --git a/spec/schemas/create-destination.yml b/spec/schemas/create-destination.yml
index 94a11dd98bade859967ba4b604ba49b8e068ff81..8fc4a2a22e3c5cfbb6a4129156693c2912a2d63c 100644
--- a/spec/schemas/create-destination.yml
+++ b/spec/schemas/create-destination.yml
@@ -1,7 +1,6 @@
 title: Objekt zum Erzeugen eines Zustellpunkts
 description: 'Notwendige Struktur, um einen Zustellpunkt zu hinterlegen.'
 type: object
-additionalProperties: false
 required:
   - contactInformation
   - schemas
diff --git a/spec/schemas/empty-body.yml b/spec/schemas/empty-body.yml
index e1531d5552bc5722fbf6f068514982f700a8af9f..0bcd2313ab95d96d886e713c1668ae6ede737d3d 100644
--- a/spec/schemas/empty-body.yml
+++ b/spec/schemas/empty-body.yml
@@ -1,3 +1,2 @@
 title: Leeres JSON-Objekt
 type: object
-additionalProperties: false
diff --git a/spec/schemas/jwk.yml b/spec/schemas/jwk.yml
index 043c0c6867e3dc3c68cc2a4730c97e30346ebbb1..2512fd2c71da7cdd45bbc39ee483da048c5d71c1 100644
--- a/spec/schemas/jwk.yml
+++ b/spec/schemas/jwk.yml
@@ -1,7 +1,6 @@
 title: JSON Web Key (JWK)
 type: object
 description: JSON Web Key - RFC 7517
-additionalProperties: false
 required:
   - kty
   - key_ops
diff --git a/spec/schemas/state-transition.yml b/spec/schemas/state-transition.yml
index 631b9f6dbb8c87892e522461317108d48e090a6b..ae367f184c0a74dcde381f4d9d211fe08fefd1a4 100644
--- a/spec/schemas/state-transition.yml
+++ b/spec/schemas/state-transition.yml
@@ -5,7 +5,6 @@ required:
   - sourceState
   - targetState
   - timestamp
-additionalProperties: false
 properties:
   sourceState:
     $ref: './application-state.yml'
@@ -15,4 +14,4 @@ properties:
     type: string
   timestamp:
     type: string
-    format: date-time
\ No newline at end of file
+    format: date-time
diff --git a/spec/schemas/update-destination.yml b/spec/schemas/update-destination.yml
index 194a6bd1699cce39d978705e6f982e9b0d4dc3e2..aa93cc1a42b254f88f3a0f0764e25e108b4f8dd3 100644
--- a/spec/schemas/update-destination.yml
+++ b/spec/schemas/update-destination.yml
@@ -1,7 +1,6 @@
 title: Aktualisierung eines Zustellpunktes
 description: 'Struktur mit Attributen, die aktualisiert werden sollen.'
 type: object
-additionalProperties: false
 required:
   - contactInformation
   - schemas