diff --git a/README.md b/README.md
index 2b0a74d..a635fa4 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ you've used a 360 controller before)
 - Connection method:
   - Micro USB cable
   - [Sony Wireless Adapter](https://www.amazon.com/gp/product/B01KYVLKG2)
-  - Bluetooth 2.1+ (via an
+  - Bluetooth 4.0 (via an
 [adapter like this](https://www.newegg.com/Product/Product.aspx?Item=N82E16833166126)
 or built in pc). Only use of Microsoft BT stack is supported. CSR BT stack is
 confirmed to not work with the DS4 even though some CSR adapters work fine