diff --git a/plugin-api.d.ts b/plugin-api.d.ts
index 533134d..a481753 100644
--- a/plugin-api.d.ts
+++ b/plugin-api.d.ts
@@ -822,7 +822,13 @@ interface Easing {
     | 'EASE_OUT_BACK'
     | 'EASE_IN_AND_OUT_BACK'
     | 'CUSTOM_CUBIC_BEZIER'
+    | 'GENTLE'
+    | 'QUICK'
+    | 'BOUNCY'
+    | 'SLOW'
+    | 'CUSTOM_SPRING'
   readonly easingFunctionCubicBezier?: EasingFunctionBezier
+  readonly easingFunctionSpring?: EasingFunctionSpring
 }
 interface EasingFunctionBezier {
   x1: number
@@ -830,6 +836,12 @@ interface EasingFunctionBezier {
   x2: number
   y2: number
 }
+interface EasingFunctionSpring {
+  mass: number
+  stiffness: number
+  damping: number
+  initialVelocity: number
+}
 declare type OverflowDirection = 'NONE' | 'HORIZONTAL' | 'VERTICAL' | 'BOTH'
 declare type OverlayPositionType =
   | 'CENTER'