diff --git a/src/types/index.d.ts b/src/types/index.d.ts
index 32831adc88c..b12ee664009 100644
--- a/src/types/index.d.ts
+++ b/src/types/index.d.ts
@@ -3101,7 +3101,7 @@ export interface GridLineOptions {
   /**
    * @default 1
    */
-  tickWidth: number;
+  tickWidth: Scriptable<number, ScriptableScaleContext>;
   /**
    * @default false
    */