diff --git a/JavaScript/index.js b/JavaScript/index.js
index 09feea6..2fe4ac5 100644
--- a/JavaScript/index.js
+++ b/JavaScript/index.js
@@ -39,7 +39,7 @@ class Genid {
             options.SeqBitLength = SeqBitLength;
         }
         // 5.MaxSeqNumber
-        const MaxSeqNumber = (1 << SeqBitLength) - 1;
+        const MaxSeqNumber = (1 << options.SeqBitLength) - 1;
         if (options.MaxSeqNumber <= 0 || options.MaxSeqNumber === undefined) {
             options.MaxSeqNumber = MaxSeqNumber;
         }
diff --git a/TypeScript/snowflakeIdv1.ts b/TypeScript/snowflakeIdv1.ts
index 41198c3..b04e74a 100644
--- a/TypeScript/snowflakeIdv1.ts
+++ b/TypeScript/snowflakeIdv1.ts
@@ -115,7 +115,7 @@ export class snowflakeIdv1 {
 
         // 5.MaxSeqNumber
         if (options.maxSeqNumber == undefined || options.maxSeqNumber <= 0)
-            options.maxSeqNumber = (1 << SeqBitLength) - 1
+            options.maxSeqNumber = (1 << options.SeqBitLength) - 1
 
         // 6.MinSeqNumber
         const MinSeqNumber = 5