diff --git a/clsx.d.mts b/clsx.d.mts
index 2220c93..025bb7f 100644
--- a/clsx.d.mts
+++ b/clsx.d.mts
@@ -1,4 +1,4 @@
-export type ClassValue = ClassArray | ClassDictionary | string | number | null | boolean | undefined;
+export type ClassValue = ClassArray | ClassDictionary | string | number | bigint | null | boolean | undefined;
 export type ClassDictionary = Record<string, any>;
 export type ClassArray = ClassValue[];
 
diff --git a/clsx.d.ts b/clsx.d.ts
index b86650a..a4233f5 100644
--- a/clsx.d.ts
+++ b/clsx.d.ts
@@ -1,5 +1,5 @@
 declare namespace clsx {
-	type ClassValue = ClassArray | ClassDictionary | string | number | null | boolean | undefined;
+	type ClassValue = ClassArray | ClassDictionary | string | number | bigint | null | boolean | undefined;
 	type ClassDictionary = Record<string, any>;
 	type ClassArray = ClassValue[];
 	function clsx(...inputs: ClassValue[]): string;