diff --git a/cli/tsc/dts/lib.deno.ns.d.ts b/cli/tsc/dts/lib.deno.ns.d.ts
index 395f8c667d..4d8c9293e7 100644
--- a/cli/tsc/dts/lib.deno.ns.d.ts
+++ b/cli/tsc/dts/lib.deno.ns.d.ts
@@ -1565,7 +1565,7 @@ declare namespace Deno {
      *
      * It returns the updated offset.
      */
-    seekSync(offset: number, whence: SeekMode): number;
+    seekSync(offset: number | bigint, whence: SeekMode): number;
   }
 
   /**
@@ -1893,7 +1893,7 @@ declare namespace Deno {
    */
   export function seekSync(
     rid: number,
-    offset: number,
+    offset: number | bigint,
     whence: SeekMode,
   ): number;