diff --git a/reverse-string/sol.go b/reverse-string/sol.go
new file mode 100644
index 0000000..12776e7
--- /dev/null
+++ b/reverse-string/sol.go
@@ -0,0 +1,12 @@
+package main
+
+// Time: O(n)
+// Space: O(1)
+func reverseString(s []byte) {
+	l := len(s)
+	for p := 0; p <= (l-1)/2; p++ {
+		tmp := s[p]
+		s[p] = s[l-p-1]
+		s[l-p-1] = tmp
+	}
+}