diff --git a/lib/parse.js b/lib/parse.js
index 84d142f..f20d448 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -173,10 +173,12 @@ var json_parse = function (options) {
       // Parse a number value.
 
       var number,
-        string = '';
+        string = '',
+        is_positive = true;
 
       if (ch === '-') {
         string = '-';
+        is_positive = false;
         next('-');
       }
       while (ch >= '0' && ch <= '9') {
@@ -202,8 +204,9 @@ var json_parse = function (options) {
         }
       }
       number = +string;
+      if (isNaN(number)) error(`Bad number`);
       if (!isFinite(number)) {
-        error('Bad number');
+        return is_positive ? Infinity : -Infinity;
       } else {
         if (BigNumber == null) BigNumber = require('bignumber.js');
         if (Number.isSafeInteger(number))
diff --git a/test/bigint-parse-test.js b/test/bigint-parse-test.js
index 4156b3e..e281c15 100644
--- a/test/bigint-parse-test.js
+++ b/test/bigint-parse-test.js
@@ -10,6 +10,7 @@ describe("Testing native BigInt support: parse", function () {
     return;
   }
   var input = '{"big":92233720368547758070,"small":123,"deci":1234567890.0123456,"shortExp":1.79e+308,"longExp":1.7976931348623157e+308}';
+  var infInput = '{"upperInf":1.797693134862316e+308,"lowerInf":-1.797693134862316e+308}';
 
   it("Should show JSONbig does support parsing native BigInt", function (done) {
     var JSONbig = require('../index')({
@@ -71,4 +72,24 @@ describe("Testing native BigInt support: parse", function () {
     expect(output).to.equal(input);
     done();
   });
-});
\ No newline at end of file
+
+  it(`Should show JSONbig parses a number bigger than the upper infinity limit (> 1.797693134862315E+308) as Infinity`, function (done) {
+    var JSONbig = require('../index')({
+      "alwaysParseAsBig": true,
+      "useNativeBigInt": true
+    });
+    var obj = JSONbig.parse(infInput);
+    expect(obj.upperInf, "upper infinity").to.equal(Infinity);
+    done();
+  });
+
+  it(`Should show JSONbig parses a number smaller than the lower infinity limit (< -1.797693134862315E+308) as -Infinity`, function (done) {
+    var JSONbig = require('../index')({
+      "alwaysParseAsBig": true,
+      "useNativeBigInt": true
+    });
+    var obj = JSONbig.parse(infInput);
+    expect(obj.lowerInf, "lower infinity").to.equal(-Infinity);
+    done();
+  });
+});