diff --git a/src/components/GitProfile.jsx b/src/components/GitProfile.jsx
index 55af467..9c45cfc 100644
--- a/src/components/GitProfile.jsx
+++ b/src/components/GitProfile.jsx
@@ -277,7 +277,15 @@ GitProfile.propTypes = {
       disableSwitch: PropTypes.bool,
       respectPrefersColorScheme: PropTypes.bool,
       themes: PropTypes.array,
-      customTheme: PropTypes.object,
+      customTheme: PropTypes.shape({
+        primary: PropTypes.string,
+        secondary: PropTypes.string,
+        accent: PropTypes.string,
+        neutral: PropTypes.string,
+        'base-100': PropTypes.string,
+        '--rounded-box': PropTypes.string,
+        '--rounded-btn': PropTypes.string,
+      }),
     }),
   }).isRequired,
 };
diff --git a/types/index.d.ts b/types/index.d.ts
index cdde22a..d53024f 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -128,6 +128,43 @@ export interface Hotjar {
   snippetVersion?: number;
 }
 
+export interface CustomTheme {
+  /**
+   * Primary color
+   */
+  primary?: string;
+
+  /**
+   * Secondary color
+   */
+  secondary?: string;
+
+  /**
+   * Accent color
+   */
+  accent?: string;
+
+  /**
+   * Neutral color
+   */
+  neutral?: string;
+
+  /**
+   * Base color of page
+   */
+  'base-100'?: string;
+
+  /**
+   * Border radius of rounded-box
+   */
+  '--rounded-box'?: string;
+
+  /**
+   * Border radius of rounded-btn
+   */
+  '--rounded-btn'?: string;
+}
+
 export interface ThemeConfig {
   /**
    * Default theme
@@ -152,7 +189,7 @@ export interface ThemeConfig {
   /**
    * Custom theme
    */
-  customTheme?: object;
+  customTheme?: CustomTheme;
 }
 
 export interface Experience {