diff --git a/kotlin/66-Plus-One.kt b/kotlin/66-Plus-One.kt
new file mode 100644
index 000000000..894ccb779
--- /dev/null
+++ b/kotlin/66-Plus-One.kt
@@ -0,0 +1,14 @@
+class Solution {
+    fun plusOne(digits: IntArray): IntArray {
+        for (i in digits.size-1 downTo 0) {
+            digits[i] += 1
+
+            if (digits[i] <= 9)
+                return digits
+
+            digits[i] = 0
+        }
+
+        return IntArray(digits.size+1).also{ it[0] = 1 }
+    }
+}
\ No newline at end of file