diff --git a/go.mod b/go.mod
index ce1232c..45c821c 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.20
 
 require (
 	github.com/asticode/go-astits v1.13.0
-	github.com/bluenviron/mediacommon v1.12.0
+	github.com/bluenviron/mediacommon v1.12.1
 	github.com/stretchr/testify v1.9.0
 )
 
diff --git a/go.sum b/go.sum
index 631db4e..0b45460 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,8 @@ github.com/asticode/go-astikit v0.30.0 h1:DkBkRQRIxYcknlaU7W7ksNfn4gMFsB0tqMJflx
 github.com/asticode/go-astikit v0.30.0/go.mod h1:h4ly7idim1tNhaVkdVBeXQZEE3L0xblP7fCWbgwipF0=
 github.com/asticode/go-astits v1.13.0 h1:XOgkaadfZODnyZRR5Y0/DWkA9vrkLLPLeeOvDwfKZ1c=
 github.com/asticode/go-astits v1.13.0/go.mod h1:QSHmknZ51pf6KJdHKZHJTLlMegIrhega3LPWz3ND/iI=
-github.com/bluenviron/mediacommon v1.12.0 h1:j6L3Ikn+dyJvvG3rbm0gjbsUJ11fqh5nIlhNgYAjEx8=
-github.com/bluenviron/mediacommon v1.12.0/go.mod h1:HDyW2CzjvhYJXtdxstdFPio3G0qSocPhqkhUt/qffec=
+github.com/bluenviron/mediacommon v1.12.1 h1:sgDJaKV6OXrPCSO0KPp9zi/pwNWtKHenn5/dvjtY+Tg=
+github.com/bluenviron/mediacommon v1.12.1/go.mod h1:HDyW2CzjvhYJXtdxstdFPio3G0qSocPhqkhUt/qffec=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
diff --git a/muxer_test.go b/muxer_test.go
index dee716e..f5e6017 100644
--- a/muxer_test.go
+++ b/muxer_test.go
@@ -799,13 +799,13 @@ func TestMuxerDynamicParams(t *testing.T) {
 
 	err = m.WriteH264(testTime, 3*time.Second, [][]byte{
 		testSPS2,
-		{5}, // IDR
+		{0x65, 0x88, 0x84, 0x00, 0x33, 0xff}, // IDR
 		{2},
 	})
 	require.NoError(t, err)
 
 	err = m.WriteH264(testTime, 5*time.Second, [][]byte{
-		{5}, // IDR
+		{0x65, 0x88, 0x84, 0x00, 0x33, 0xff}, // IDR
 	})
 	require.NoError(t, err)
 
@@ -815,7 +815,7 @@ func TestMuxerDynamicParams(t *testing.T) {
 		"#EXT-X-VERSION:9\n"+
 		"#EXT-X-INDEPENDENT-SEGMENTS\n"+
 		"\n"+
-		"#EXT-X-STREAM-INF:BANDWIDTH=912,AVERAGE-BANDWIDTH=742,"+
+		"#EXT-X-STREAM-INF:BANDWIDTH=912,AVERAGE-BANDWIDTH=752,"+
 		"CODECS=\"avc1.64001f\",RESOLUTION=1280x720,FRAME-RATE=30.000\n"+
 		"stream.m3u8\n", string(bu))