diff --git a/convert-anystyle-data/anystyle-to-tei.ipynb b/convert-anystyle-data/anystyle-to-tei.ipynb
index b9994e23d568e2548be089a52beb299dfdb0a960..6b5af98331283051d7fafb30734f9a9f79e0ef91 100644
--- a/convert-anystyle-data/anystyle-to-tei.ipynb
+++ b/convert-anystyle-data/anystyle-to-tei.ipynb
@@ -431,20 +431,27 @@
     "import glob\n",
     "from urllib.request import urlopen\n",
     "import requests\n",
-    "import traceback\n",
+    "\n",
+    "if not 'cache' in locals():\n",
+    "    cache = {}\n",
     "\n",
     "class HttpsResolver(etree.Resolver):\n",
-    "    def resolve(self, url, id, context):     \n",
-    "        r = requests.get(url)\n",
-    "        assert(r.status_code == 200)\n",
-    "        return self.resolve_string(r.content, context, base_url=url)\n",
+    "    def resolve(self, url, id, context):\n",
+    "        if url in cache:\n",
+    "            xml_str = cache[url]\n",
+    "        else:\n",
+    "            r = requests.get(url)\n",
+    "            assert(r.status_code == 200)\n",
+    "            xml_str = cache[url] = r.content\n",
+    "        return self.resolve_string(xml_str, context, base_url=url)\n",
+    "\n",
+    "xml_parser = etree.XMLParser(no_network=False)\n",
+    "xml_parser.resolvers.add(HttpsResolver())\n",
     "\n",
     "def apply_xslt(xslt_path, xml_input_path, xml_output_path):\n",
     "    try:\n",
     "        if xslt_path.startswith('http'):\n",
     "            with urlopen(xslt_path) as f:\n",
-    "                xml_parser = etree.XMLParser(no_network=False)\n",
-    "                xml_parser.resolvers.add(HttpsResolver())\n",
     "                xslt_doc = etree.parse(f, parser=xml_parser)\n",
     "        else:\n",
     "            xslt_doc = etree.parse(xslt_path)\n",
@@ -467,8 +474,8 @@
    "metadata": {
     "collapsed": false,
     "ExecuteTime": {
-     "end_time": "2024-08-03T20:28:20.087934Z",
-     "start_time": "2024-08-03T20:28:18.699591Z"
+     "end_time": "2024-08-03T20:47:26.220279Z",
+     "start_time": "2024-08-03T20:47:25.805461Z"
     }
    },
    "id": "cb3b4140ab153c08",
@@ -488,7 +495,7 @@
      ]
     }
    ],
-   "execution_count": 28
+   "execution_count": 33
   },
   {
    "metadata": {