diff --git a/package-lock.json b/package-lock.json
index f1536b0..65e173d 100644
--- a/package-lock.json
+++ b/package-lock.json
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     "xlsx": {
@@ -1742,6 +1746,11 @@
       "resolved": "http://registry.npmjs.org/xmlbuilder/-/xmlbuilder-9.0.7.tgz",
       "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0="
     },
+    "xmlchars": {
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-1.3.1.tgz",
+      "integrity": "sha512-tGkGJkN8XqCod7OT+EvGYK5Z4SfDQGD30zAa58OcnAa0RRWgzUEK72tkXhsX1FZd+rgnhRxFtmO+ihkp8LHSkw=="
+    },
     "xmldom": {
       "version": "0.1.19",
       "resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.1.19.tgz",
diff --git a/package.json b/package.json
index 328f01f..44542b1 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "html-entities": "^1.2.1",
     "iri": "^1.3.0",
     "jquery": "^3.4.1",
-    "jsdom": "^11.6.2",
+    "jsdom": "^15.1.1",
     "json": "^9.0.6",
     "jsonld": "^0.4.12",
     "node-json2html": "^1.1.1",