diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 0050dddd..8adf197d 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -55,6 +55,7 @@ export type UnresolvedValueKeyframe = ValueKeyframe | null
 
 export type Easing =
   | "linear"
+  | `linear(${string})`
   | "ease"
   | "ease-in"
   | "ease-out"
@@ -62,6 +63,7 @@ export type Easing =
   | "steps-start"
   | "steps-end"
   | `steps(${number}, ${"start" | "end"})`
+  | `cubic-bezier(${string})`
   | BezierDefinition
 
 export type EasingGenerator = {