Updated SliceTricks (markdown)
diff --git a/SliceTricks.md b/SliceTricks.md
index 72f0113..a9e16bc 100644
--- a/SliceTricks.md
+++ b/SliceTricks.md
@@ -137,6 +137,9 @@
 ### Shuffling
 
 Fisher–Yates algorithm:
+
+> Since go1.10, this is available at [math/rand.Shuffle](https://godoc.org/math/rand#Shuffle)
+
 ```go
 for i := len(a) - 1; i > 0; i-- {
     j := rand.Intn(i + 1)