diff --git a/problems/0509.斐波那契数.md b/problems/0509.斐波那契数.md
index cf004b50..dddac899 100644
--- a/problems/0509.斐波那契数.md
+++ b/problems/0509.斐波那契数.md
@@ -220,7 +220,17 @@ func fib(n int) int {
         return c
 }
 ```
-
+Javascript:
+```Javascript
+var fib = function(n) {
+    let dp = [0, 1]
+    for(let i = 2; i <= n; i++) {
+        dp[i] = dp[i - 1] + dp[i - 2]
+    }
+    console.log(dp)
+    return dp[n]
+};
+```