diff --git a/CHANGELOG.md b/CHANGELOG.md
index afeaf3f..cea4e20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [1.6.0](https://github.com/ngneat/dialog/compare/v1.5.0...v1.6.0) (2021-03-21)
+
+
+### Features
+
+* allow multiple classes to be set from windowClass ([5ac3297](https://github.com/ngneat/dialog/commit/5ac3297fb664c4cd104b00648ebe21f09df55e72))
+* allow multiple classes to be set from windowClass ([d60ee41](https://github.com/ngneat/dialog/commit/d60ee4142436137e2d0c6ce2f75848796e8b717b))
+
 ## [1.5.0](https://github.com/ngneat/dialog/compare/v1.4.1...v1.5.0) (2021-03-16)
 
 
diff --git a/projects/ngneat/dialog/package.json b/projects/ngneat/dialog/package.json
index d347282..3808c4e 100644
--- a/projects/ngneat/dialog/package.json
+++ b/projects/ngneat/dialog/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ngneat/dialog",
-  "version": "1.5.0",
+  "version": "1.6.0",
   "schematics": "./schematics/collection.json",
   "description": "Simple to use, highly customizable, and powerful modal for Angular Apps",
   "dependencies": {
diff --git a/projects/ngneat/dialog/src/lib/dialog.component.spec.ts b/projects/ngneat/dialog/src/lib/dialog.component.spec.ts
index 8c7734c..a945aa8 100644
--- a/projects/ngneat/dialog/src/lib/dialog.component.spec.ts
+++ b/projects/ngneat/dialog/src/lib/dialog.component.spec.ts
@@ -215,4 +215,13 @@ describe('DialogComponent', () => {
     expect(host).toBeTruthy();
     expect(host).toBe(spectator.fixture.nativeElement);
   });
+
+  it('should set multiple classes from windowClass at host element', () => {
+    spectator = createComponent(withConfig({ windowClass: ' test-class-1 test-class-2 ' }));
+
+    const host = spectator.query('.test-class-1.test-class-2', { root: true });
+
+    expect(host).toBeTruthy();
+    expect(host).toBe(spectator.fixture.nativeElement);
+  });
 });
diff --git a/projects/ngneat/dialog/src/lib/dialog.component.ts b/projects/ngneat/dialog/src/lib/dialog.component.ts
index 1ef3954..7e4d4d2 100644
--- a/projects/ngneat/dialog/src/lib/dialog.component.ts
+++ b/projects/ngneat/dialog/src/lib/dialog.component.ts
@@ -74,7 +74,8 @@ export class DialogComponent implements OnInit, OnDestroy {
     this.nodes.forEach(node => host.appendChild(node));
 
     if (config.windowClass) {
-      host.classList.add(config.windowClass);
+      const classNames = config.windowClass.split(/\s/).filter(x => x);
+      classNames.forEach(name => host.classList.add(name));
     }
   }