diff --git a/lib/saxes.js b/lib/saxes.js
index 5a8d7b1e..45b68ab4 100644
--- a/lib/saxes.js
+++ b/lib/saxes.js
@@ -1,20 +1,8 @@
 "use strict";
 
-const {
-  XML_1_0: {
-    ED5: {
-      isS, isChar, isNameStartChar, isNameChar,
-      lists: {
-        S,
-      },
-    },
-  },
-  XMLNS_1_0: {
-    ED3: {
-      isNCNameStartChar, isNCNameChar,
-    },
-  },
-} = require("xmlchars");
+const { isS, isChar, isNameStartChar, isNameChar, S_LIST } =
+      require("xmlchars/xml/1.0/ed5");
+const { isNCNameStartChar, isNCNameChar } = require("xmlchars/xmlns/1.0/ed3");
 
 const XML_NAMESPACE = "http://www.w3.org/XML/1998/namespace";
 const XMLNS_NAMESPACE = "http://www.w3.org/2000/xmlns/";
@@ -119,8 +107,8 @@ const QUOTES = [DQUOTE, SQUOTE];
 const TEXT_TERMINATOR = [LESS, AMP];
 const DOCTYPE_TERMINATOR = [...QUOTES, OPEN_BRACKET, GREATER];
 const DOCTYPE_DTD_TERMINATOR = [...QUOTES, CLOSE_BRACKET];
-const XML_DECL_NAME_TERMINATOR = [EQUAL, QUESTION, ...S];
-const ATTRIB_VALUE_UNQUOTED_TERMINATOR = [...S, GREATER, AMP, LESS];
+const XML_DECL_NAME_TERMINATOR = [EQUAL, QUESTION, ...S_LIST];
+const ATTRIB_VALUE_UNQUOTED_TERMINATOR = [...S_LIST, GREATER, AMP, LESS];
 
 function nsMappingCheck(parser, mapping) {
   const { xml, xmlns } = mapping;
diff --git a/package-lock.json b/package-lock.json
index 6bd64319..0b60e8a0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3767,9 +3767,9 @@
       }
     },
     "xmlchars": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-1.2.0.tgz",
-      "integrity": "sha512-J9gyyXkeuZGZVqfM3sEZQGIvUP2CoCQCa02aPy+EEQScK6wcoFBj6E1pw/AVi+ZVztIKgMr/DoV9RWhiDsNA+w=="
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-1.3.1.tgz",
+      "integrity": "sha512-tGkGJkN8XqCod7OT+EvGYK5Z4SfDQGD30zAa58OcnAa0RRWgzUEK72tkXhsX1FZd+rgnhRxFtmO+ihkp8LHSkw=="
     },
     "yallist": {
       "version": "2.1.2",
diff --git a/package.json b/package.json
index cb8a9156..4d7cd6fc 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,6 @@
     "xml-conformance-suite": "^1.0.0"
   },
   "dependencies": {
-    "xmlchars": "^1.2.0"
+    "xmlchars": "^1.3.1"
   }
 }