diff --git a/ocrd_typegroups_classifier/ocrd-tool.json b/ocrd_typegroups_classifier/ocrd-tool.json
index 9b1f944..6f78477 100644
--- a/ocrd_typegroups_classifier/ocrd-tool.json
+++ b/ocrd_typegroups_classifier/ocrd-tool.json
@@ -12,12 +12,14 @@
         "recognition/font-identification"
       ],
       "input_file_grp": ["OCR-D-IMG"],
-      "output_file_grp": ["OCR-D-IMG-FONTS"],
+      "output_file_grp": ["OCR-D-FONTS"],
       "parameters": {
         "network": {
-          "description": "The file name of the neural network to use, including sufficient path information",
+          "description": "The neural network pickle file to use",
           "type": "string",
-          "required": false
+          "format": "uri",
+          "content-type": "application/octet-stream",
+          "required": true
         },
         "stride": {
           "description": "Stride applied to the CNN on the image. Should be between 1 and 224. Smaller values increase the computation time.",