diff --git a/lib/Db/Attachment.php b/lib/Db/Attachment.php
index ed1c2847..d06d4c0c 100644
--- a/lib/Db/Attachment.php
+++ b/lib/Db/Attachment.php
@@ -96,8 +96,8 @@ public function jsonSerialize(): array
 			'hash'	=> $this->hash,
 			'anonymization' => $this->anonymization,
 			'language' => $this->language,
-			'modified'	=> $this->modified->format('c'),
-			'published' => $this->published->format('c'),
+			'modified'	=> $this->modified?->format('c'),
+			'published' => $this->published?->format('c'),
 			'license' => $this->license,
 		];
 
diff --git a/lib/Db/Listing.php b/lib/Db/Listing.php
index aac47c79..503c6d30 100644
--- a/lib/Db/Listing.php
+++ b/lib/Db/Listing.php
@@ -80,7 +80,7 @@ public function jsonSerialize(): array
 			'metadata'	  => $this->metadata,
 			'catalogId'	  => $this->catalogId,
 			'status' 	  => $this->status,
-			'lastSync' 	  => $this->lastSync->format('c'),
+			'lastSync' 	  => $this->lastSync?->format('c'),
 			'default' 	  => $this->default,
 			'available'   => $this->available,
 			'organisation'=> json_decode($this->organisation, true),
diff --git a/src/store/modules/publication.js b/src/store/modules/publication.js
index cf64cf39..e8edfea7 100644
--- a/src/store/modules/publication.js
+++ b/src/store/modules/publication.js
@@ -74,9 +74,9 @@ export const usePublicationStore = defineStore(
 						},
 					)
 			},
-			getPublicationAttachments(publication) { // @todo this might belong in a service?
+			getPublicationAttachments(publicationId) {
 				fetch(
-					'/index.php/apps/opencatalogi/api/attachments',
+					`/index.php/apps/opencatalogi/api/publications/${publicationId}/attachments`,
 					{
 						method: 'GET',
 					},
@@ -187,9 +187,9 @@ export const usePublicationStore = defineStore(
 				})
 		},
 		/* istanbul ignore next */ // ignore this for Jest until moved into a service
-		getPublicationAttachments(publication) { // @todo this might belong in a service?
+		getPublicationAttachments(publicationId) {
 			fetch(
-				'/index.php/apps/opencatalogi/api/attachments',
+				'/index.php/apps/opencatalogi/api/publications/' + publicationId + '/attachments',
 				{
 					method: 'GET',
 				},
diff --git a/src/views/publications/PublicationDetail.vue b/src/views/publications/PublicationDetail.vue
index de33872a..83c99954 100644
--- a/src/views/publications/PublicationDetail.vue
+++ b/src/views/publications/PublicationDetail.vue
@@ -477,7 +477,7 @@ export default {
 						// this.oldZaakId = id
 						this.fetchCatalogi(data.catalogi?.id)
 						this.fetchMetaData(data.metaData?.id)
-						publicationStore.getPublicationAttachments()
+						publicationStore.getPublicationAttachments(id)
 						// this.loading = false
 					})
 				})