diff --git a/wireguard-go b/wireguard-go
index d0c2351..ebc7541 160000
--- a/wireguard-go
+++ b/wireguard-go
@@ -1 +1 @@
-Subproject commit d0c23518371e9ae438e242ad5132e34832915c7e
+Subproject commit ebc7541953269b39cd73d703166b9b8ee7b34e37
diff --git a/wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/tun/tun_ios.go b/wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/tun/tun_ios.go
index fd8a1a1..93a0503 100644
--- a/wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/tun/tun_ios.go
+++ b/wireguard-go-bridge/src/git.zx2c4.com/wireguard-go/tun/tun_ios.go
@@ -51,8 +51,7 @@ func (tun *nativeTun) Events() chan TUNEvent {
 }
 
 func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
-	buff = buff[offset:]
-	ret := C.callFnWithCtx(tun.readFn, tun.ctx, unsafe.Pointer(&buff[0]), C.size_t(len(buff)))
+	ret := C.callFnWithCtx(tun.readFn, tun.ctx, unsafe.Pointer(&buff[offset]), C.size_t(len(buff) - offset))
 	if ret < 0 {
 		return 0, syscall.Errno(-ret)
 	}
@@ -60,8 +59,7 @@ func (tun *nativeTun) Read(buff []byte, offset int) (int, error) {
 }
 
 func (tun *nativeTun) Write(buff []byte, offset int) (int, error) {
-	buff = buff[offset:]
-	ret := C.callFnWithCtx(tun.writeFn, tun.ctx, unsafe.Pointer(&buff[0]), C.size_t(len(buff)))
+	ret := C.callFnWithCtx(tun.writeFn, tun.ctx, unsafe.Pointer(&buff[offset]), C.size_t(len(buff) - offset))
 	if ret < 0 {
 		return 0, syscall.Errno(-ret)
 	}