diff --git a/wario/utils.ipynb b/wario/utils.ipynb
index 40b00106e94ec2b774483881dddf5c80ae224bb1..2019c1a06041e1a824b683501acfaa1765eda3e0 100644
--- a/wario/utils.ipynb
+++ b/wario/utils.ipynb
@@ -421,8 +421,8 @@
     "\n",
     "    if var_dict[\"do_pdb\"]:\n",
     "        \n",
-    "        conf_list = os.listdir("/".join([var_dict["ensemble_path"],var_dict["folders"][0]]))\n",
-    "        md_file = md.load_pdb(\"/\".join([var_dict["ensemble_path"], var_dict[\"folders\"][0],conf_list[0]]))\n",
+    "        conf_list = os.listdir("/".join([var_dict[\"ensemble_path"\],var_dict[\"folders"\][0]]))\n",
+    "        md_file = md.load_pdb(\"/\".join([var_dict[\"ensemble_path"\], var_dict[\"folders\"][0],conf_list[0]]))\n",
     "        L = md_file.topology.n_residues\n",
     "        Nconf = len(conf_list)\n",
     "        \n",