diff --git a/.changeset/plenty-plants-hunt.md b/.changeset/plenty-plants-hunt.md
new file mode 100644
index 00000000..5fec8bab
--- /dev/null
+++ b/.changeset/plenty-plants-hunt.md
@@ -0,0 +1,5 @@
+---
+'@open-wc/scoped-elements': patch
+---
+
+refactor to remove optional chaining syntax in Cache file for better tooling compatibility
diff --git a/packages/scoped-elements/src/Cache.js b/packages/scoped-elements/src/Cache.js
index da1781ff..036396dd 100644
--- a/packages/scoped-elements/src/Cache.js
+++ b/packages/scoped-elements/src/Cache.js
@@ -19,7 +19,7 @@ export class Cache {
    * @return {boolean}
    */
   has(key) {
-    return !!(this._cache.has(key) || this._parent?._cache.has(key));
+    return !!(this._cache.has(key) || (this._parent && this._parent._cache.has(key)));
   }
 
   /**
@@ -44,6 +44,6 @@ export class Cache {
    * @return {Q}
    */
   get(key) {
-    return this._cache.get(key) || this._parent?._cache.get(key);
+    return this._cache.get(key) || (this._parent && this._parent._cache.get(key));
   }
 }
diff --git a/packages/scoped-elements/test-web/Cache.test.js b/packages/scoped-elements/test-web/Cache.test.js
index b7ced4dc..53e8f94a 100644
--- a/packages/scoped-elements/test-web/Cache.test.js
+++ b/packages/scoped-elements/test-web/Cache.test.js
@@ -24,6 +24,12 @@ describe('Cache', () => {
       expect(cache.has('key')).to.be.false;
     });
 
+    it(`should return false if the key does not exist and no parent exists`, () => {
+      const cache = new Cache();
+
+      expect(cache.has('key')).to.be.false;
+    });
+
     it(`should return true if the key exist`, () => {
       const cache = new Cache();
       cache._cache.set('key', 'value');
@@ -93,6 +99,12 @@ describe('Cache', () => {
       expect(cache.get('key')).to.be.undefined;
     });
 
+    it('should return undefined in case key does not exist and parent does not exist', () => {
+      const cache = new Cache();
+
+      expect(cache.get('key')).to.be.undefined;
+    });
+
     it('should return undefined in case the key is not provided', () => {
       const parent = new Cache();
       const cache = new Cache(parent);