diff --git a/README.md b/README.md
index a8f6d88..7194bae 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,7 @@ width                 | number                 | **required**            | Thick
 backgroundWidth       | number                 | width                   | Thickness of background circle
 fill                  | number (0-100)         | 0                       | Current progress / fill
 tintColor             | string                 | black                   | Color of the progress line
+tintColorSecondary    | string                 | black                   | Secondary color of the progress line
 tintTransparency      | boolean                | true                    | Transparency of the progress line
 backgroundColor       | string                 |                         | If unspecified, no background line will be rendered
 rotation              | number (-360 - 360)    | 90                      | Angle from which the progress starts from
diff --git a/index.d.ts b/index.d.ts
index f2d219c..45cfb1d 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -127,6 +127,13 @@ declare module 'react-native-circular-progress' {
      */
     tintColor?: string;
 
+    /**
+     * Secondary color of the progress line
+     *
+     * @type {string}
+     * @default 'black'
+     */
+    tintColorSecondary?: string;
 
     /**
      * Current progress / tint transparency