diff --git a/changelog.md b/changelog.md
index da45d59..e395b7a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2025-07-06 - 2.1.0 - feat(DeesElement)
+Add invocation of the themeChanged hook in connectedCallback
+
+- Now calls themeChanged (if defined) when the theme changes, enabling custom handlers for theme switches
+- Improves lifecycle management by allowing extensions to react to bright/dark mode changes
+
 ## 2025-06-20 - 2.0.44 - fix(ci)
 Remove obsolete GitLab CI configuration
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 977b4a7..27011a0 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-element',
-  version: '2.0.44',
+  version: '2.1.0',
   description: 'A library for creating custom elements extending the lit element class with additional functionalities.'
 }
diff --git a/ts/classes.dees-element.ts b/ts/classes.dees-element.ts
index 46523ad..c553b5e 100644
--- a/ts/classes.dees-element.ts
+++ b/ts/classes.dees-element.ts
@@ -25,11 +25,22 @@ export class DeesElement extends plugins.lit.LitElement {
     });
   }
 
+  /**
+   * Called when the theme changes between bright and dark.
+   * Override this method to handle theme changes.
+   * @param goBright - true if switching to bright theme, false if switching to dark theme
+   */
+  protected themeChanged?(goBright: boolean): void;
+
   public async connectedCallback() {
     super.connectedCallback();
     const domtools = await this.domtoolsPromise;
     this.themeSubscription = domtools.themeManager.themeObservable.subscribe((goBrightArg) => {
       this.goBright = goBrightArg;
+      // Call themeChanged if it's defined
+      if (this.themeChanged) {
+        this.themeChanged(goBrightArg);
+      }
     });
     this.rxSubscriptions.push(this.themeSubscription);
     for (const startupFunction of this.startupFunctions) {