diff --git a/common/Utils.ts b/common/Utils.ts
index de5a8dcf..f33c68d5 100644
--- a/common/Utils.ts
+++ b/common/Utils.ts
@@ -90,14 +90,14 @@ export class Utils {
         continue;
       }
 
-      const part = args[i].replace('\\', '/');
+      const part = args[i].replace(new RegExp('\\\\', 'g'), '/');
       if (part === '/' || part === './') {
         continue;
       }
 
       url += part + '/';
     }
-    url = url.replace('//', '/');
+    url = url.replace(new RegExp('/+', 'g'), '/');
 
     if (url.trim() === '') {
       url = './';
diff --git a/test/common/unit/Utils.spec.ts b/test/common/unit/Utils.spec.ts
new file mode 100644
index 00000000..6895a564
--- /dev/null
+++ b/test/common/unit/Utils.spec.ts
@@ -0,0 +1,18 @@
+import {expect} from 'chai';
+import {Utils} from '../../../common/Utils';
+
+describe('Utils', () => {
+  it('should concat urls', () => {
+    expect(Utils.concatUrls('abc', 'cde')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc/', 'cde')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc\\', 'cde')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc/', 'cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('./abc\\', 'cde/')).to.be.equal('./abc/cde');
+    expect(Utils.concatUrls('abc/', '\\cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc\\', '\\cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc\\', '/cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc/', '/cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc\\/', '/cde/')).to.be.equal('abc/cde');
+    expect(Utils.concatUrls('abc\\/', '/cde/', 'fgh')).to.be.equal('abc/cde/fgh');
+  });
+});