diff --git a/bielefeld/Taskfile.yml b/bielefeld/Taskfile.yml
index 0697fe9..475b787 100644
--- a/bielefeld/Taskfile.yml
+++ b/bielefeld/Taskfile.yml
@@ -93,6 +93,10 @@ tasks:
         "$CLIENT" -P {{.PORT}} "{{.PROJECT}}"
         --apply config/urlencode.json
         > {{.LOG}}
+      - > # internetMediaType bei Dateiendung .pdf in URL einheitlich auf application/pdf setzen
+        "$CLIENT" -P {{.PORT}} "{{.PROJECT}}"
+        --apply config/mime.json
+        > {{.LOG}}
       - > # Rechteangaben aus dc:rights in Format OAI_DC ergänzen
         "$CLIENT" -P {{.PORT}} "{{.PROJECT}}"
         --apply config/rights.json
diff --git a/bielefeld/config/mime.json b/bielefeld/config/mime.json
new file mode 100644
index 0000000..bd48835
--- /dev/null
+++ b/bielefeld/config/mime.json
@@ -0,0 +1,25 @@
+[
+  {
+    "op": "core/text-transform",
+    "engineConfig": {
+      "facets": [
+        {
+          "type": "text",
+          "name": "relatedItem - location - url - displayLabel",
+          "columnName": "relatedItem - location - url - displayLabel",
+          "query": "\\.pdf$",
+          "mode": "regex",
+          "caseSensitive": false,
+          "invert": false
+        }
+      ],
+      "mode": "row-based"
+    },
+    "columnName": "relatedItem - physicalDescription - internetMediaType",
+    "expression": "grel:'application/pdf'",
+    "onError": "keep-original",
+    "repeat": false,
+    "repeatCount": 10,
+    "description": "Text transform on cells in column relatedItem - physicalDescription - internetMediaType using expression grel:'application/pdf'"
+  }
+]