diff --git a/src/MDRequirementsSet.php b/src/MDRequirementsSet.php
index fcfd593..a41558c 100644
--- a/src/MDRequirementsSet.php
+++ b/src/MDRequirementsSet.php
@@ -36,11 +36,11 @@ final class MDRequirementsSet {
 
     const MIMETYPES_COLLECTION_IMAGE = ['image/jpeg', 'image/jpg'];
     const MIMETYPES_INSTITUTION_IMAGE = ['image/jpeg', 'image/jpg'];
-    const MIMETYPES_EXHIBITION_IMAGE = ['image/jpeg', 'image/jpg', 'image/png'];
+    const MIMETYPES_EXHIBITION_IMAGE = ['image/jpeg', 'image/jpg'];
 
     const MIMETYPES_ARTICLE_ASSET = ['image/jpeg', 'image/jpg', 'image/png'];
 
-    const MIMETYPES_APPOINTMENT_IMAGE = ['image/jpeg', 'image/jpg', 'image/png'];
+    const MIMETYPES_APPOINTMENT_IMAGE = ['image/jpeg', 'image/jpg'];
     const MIMETYPES_APPOINTMENT_DOC_ASSET = ['application/pdf', 'image/jpeg', 'image/jpg', 'image/png'];
 
     const MIMETYPES_PODCAST_IMAGE = ['image/jpeg', 'image/jpg'];