diff --git a/package.json b/package.json
index 0313490..3779edb 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,8 @@
     "test:browser": "karmatic",
     "test:node": "jest",
     "pretest": "yarn run build",
-    "test": "jest && karmatic"
+    "test": "jest && karmatic",
+    "release": "release-it"
   },
   "author": "Janicklas Ralph",
   "license": "Apache-2.0",
diff --git a/src/index.test.js b/src/index.test.js
index 8ba0675..92dcd74 100644
--- a/src/index.test.js
+++ b/src/index.test.js
@@ -108,6 +108,24 @@ describe('Basic parse and format:', () => {
   });
 });
 
+parseTestsWithQueryString = {
+  ...parseTestsWithQueryString,
+  '/example?query=size:10': {
+    protocol: null,
+    slashes: null,
+    auth: null,
+    host: null,
+    port: null,
+    hostname: null,
+    hash: null,
+    search: '?query=size:10',
+    query: { query: 'size:10' },
+    pathname: '/example',
+    path: '/example?query=size:10',
+    href: '/example?query=size:10',
+  },
+};
+
 describe('With querystring:', () => {
   Object.keys(parseTestsWithQueryString).forEach(function (u) {
     it(`parse(${u}):`, () => {
diff --git a/src/parse.js b/src/parse.js
index 16c6d05..004f545 100644
--- a/src/parse.js
+++ b/src/parse.js
@@ -83,7 +83,7 @@ export default function (urlStr, parseQs = false, slashesDenoteHost = false) {
   }
 
   // If port is 80 we change it to 8000 and undo it later
-  let portMatch = urlStr.match(/(:[0-9]+)/);
+  let portMatch = (slashesMatch ? slashesMatch[1] : urlStr).match(/(:[0-9]+)/);
   let portSuffix = '';
 
   if (portMatch && portMatch[1] && portMatch[1].length === 3) {