diff --git a/go.mod b/go.mod
index 363db65a8..4255ce12c 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/gopherjs/gopherwasm v0.1.1
 	github.com/hajimehoshi/bitmapfont v1.1.0
 	github.com/hajimehoshi/go-mp3 v0.1.1
-	github.com/hajimehoshi/oto v0.1.2
+	github.com/hajimehoshi/oto v0.1.3
 	github.com/jakecoffman/cp v0.1.0
 	github.com/jfreymuth/oggvorbis v1.0.0
 	github.com/jfreymuth/vorbis v1.0.0 // indirect
@@ -16,6 +16,6 @@ require (
 	golang.org/x/image v0.0.0-20180708004352-c73c2afc3b81
 	golang.org/x/mobile v0.0.0-20180808221059-bceb7ef27cc6
 	golang.org/x/sys v0.0.0-20180814072032-4e1fef560951
-	golang.org/x/tools v0.0.0-20180831211245-7ca132754999 // indirect
+	golang.org/x/tools v0.0.0-20180910020553-af9b995e7e6d // indirect
 	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
 )
diff --git a/go.sum b/go.sum
index c5ca1286e..9032f4c65 100644
--- a/go.sum
+++ b/go.sum
@@ -13,8 +13,8 @@ github.com/hajimehoshi/bitmapfont v1.1.0/go.mod h1:KQGAlhASw21tAOCcESd/CXl1XnPU7
 github.com/hajimehoshi/go-mp3 v0.1.1 h1:Y33fAdTma70fkrxnc9u50Uq0lV6eZ+bkAlssdMmCwUc=
 github.com/hajimehoshi/go-mp3 v0.1.1/go.mod h1:4i+c5pDNKDrxl1iu9iG90/+fhP37lio6gNhjCx9WBJw=
 github.com/hajimehoshi/oto v0.1.1/go.mod h1:hUiLWeBQnbDu4pZsAhOnGqMI1ZGibS6e2qhQdfpwz04=
-github.com/hajimehoshi/oto v0.1.2 h1:qYOk4cOkcFLWov5OtekLWvgP8PCLb5iDrHWnuvMg7LM=
-github.com/hajimehoshi/oto v0.1.2/go.mod h1:1iS1lbBMU/SpoU8yZkduCxbqV/hVdGRiNwgbvYO3sG4=
+github.com/hajimehoshi/oto v0.1.3 h1:d81EeDEwougdKctpbEs1hsdEqEOnzXlh2zXDjdN4AlI=
+github.com/hajimehoshi/oto v0.1.3/go.mod h1:1iS1lbBMU/SpoU8yZkduCxbqV/hVdGRiNwgbvYO3sG4=
 github.com/jakecoffman/cp v0.1.0 h1:sgSYEGUgfwiT447fRjloa2c5b6UyYP+7muR3gQK+Ep0=
 github.com/jakecoffman/cp v0.1.0/go.mod h1:a3xPx9N8RyFAACD644t2dj/nK4SuLg1v+jL61m2yVo4=
 github.com/jfreymuth/oggvorbis v1.0.0 h1:aOpiihGrFLXpsh2osOlEvTcg5/aluzGQeC7m3uYWOZ0=
@@ -38,7 +38,7 @@ golang.org/x/mobile v0.0.0-20180808221059-bceb7ef27cc6/go.mod h1:z+o9i4GpDbdi3rU
 golang.org/x/sys v0.0.0-20180806082429-34b17bdb4300/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180814072032-4e1fef560951 h1:VfGaXvV9wRnTJreeGDE0FWEDiQP1WWUDmutCjCThDz8=
 golang.org/x/sys v0.0.0-20180814072032-4e1fef560951/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/tools v0.0.0-20180831211245-7ca132754999 h1:mf2VYfMpSMTlp0I/UXrX13w5LejDx34QeUUHH4TrUA8=
-golang.org/x/tools v0.0.0-20180831211245-7ca132754999/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20180910020553-af9b995e7e6d h1:KrEXbSl1e4tEWAo4AVuTUSgByjrai6XdpuiR+gPgUMY=
+golang.org/x/tools v0.0.0-20180910020553-af9b995e7e6d/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=