diff --git a/backend/schema/paths/nginx/certificates/certID/upload/post.json b/backend/schema/paths/nginx/certificates/certID/upload/post.json
index f38b8102..711e16c4 100644
--- a/backend/schema/paths/nginx/certificates/certID/upload/post.json
+++ b/backend/schema/paths/nginx/certificates/certID/upload/post.json
@@ -30,13 +30,16 @@
 					"required": ["certificate", "certificate_key"],
 					"properties": {
 						"certificate": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						},
 						"certificate_key": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						},
 						"intermediate_certificate": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						}
 					}
 				}
diff --git a/backend/schema/paths/nginx/certificates/validate/post.json b/backend/schema/paths/nginx/certificates/validate/post.json
index 21eb325e..f8f9531d 100644
--- a/backend/schema/paths/nginx/certificates/validate/post.json
+++ b/backend/schema/paths/nginx/certificates/validate/post.json
@@ -18,13 +18,16 @@
 					"required": ["certificate", "certificate_key"],
 					"properties": {
 						"certificate": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						},
 						"certificate_key": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						},
 						"intermediate_certificate": {
-							"type": "string"
+							"type": "string",
+							"format": "binary"
 						}
 					}
 				}