diff --git a/lib/collections/miniavs/body.ts b/lib/collections/miniavs/body.ts
index f8a1cc2..2fe2820 100644
--- a/lib/collections/miniavs/body.ts
+++ b/lib/collections/miniavs/body.ts
@@ -54,6 +54,6 @@ const shapes = [
  */
 export function generate(key: number): string {
   const color = colors[key % colors.length] as ColorMap;
-  const template = shapes[key % shapes.length] as Function;
+  const template = shapes[key % shapes.length] as (colors: ColorMap) => string;
   return template(color);
 }
diff --git a/lib/collections/miniavs/hair.ts b/lib/collections/miniavs/hair.ts
index 7701e3f..413bad9 100644
--- a/lib/collections/miniavs/hair.ts
+++ b/lib/collections/miniavs/hair.ts
@@ -61,6 +61,6 @@ const shapes = [
  */
 export function generate(key: number): string {
   const color = colors[key % colors.length] as string;
-  const template = shapes[key % shapes.length] as Function;
+  const template = shapes[key % shapes.length] as (color: string) => string;
   return template(color);
 }
diff --git a/lib/collections/miniavs/head.ts b/lib/collections/miniavs/head.ts
index f45744c..8a635d7 100644
--- a/lib/collections/miniavs/head.ts
+++ b/lib/collections/miniavs/head.ts
@@ -69,6 +69,6 @@ const shapes = [
  */
 export function generate(key: number): string {
   const color = colors[key % colors.length] as ColorMap;
-  const template = shapes[key % shapes.length] as Function;
+  const template = shapes[key % shapes.length] as (colors: ColorMap) => string;
   return template(color);
 }