diff --git a/example/go.mod b/example/go.mod
index 1d39387..47de2fc 100644
--- a/example/go.mod
+++ b/example/go.mod
@@ -4,9 +4,9 @@ go 1.16
 
 require (
 	github.com/MrAlias/flow v0.1.1
-	go.opentelemetry.io/otel v1.6.3
+	go.opentelemetry.io/otel v1.7.0
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.6.3
-	go.opentelemetry.io/otel/sdk v1.6.3
+	go.opentelemetry.io/otel/sdk v1.7.0
 )
 
 replace github.com/MrAlias/flow => ../
diff --git a/example/go.sum b/example/go.sum
index d13d1da..36ccc7d 100644
--- a/example/go.sum
+++ b/example/go.sum
@@ -231,21 +231,21 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opentelemetry.io/otel v1.6.1/go.mod h1:blzUabWHkX6LJewxvadmzafgh/wnvBSDBdOuwkAtrWQ=
-go.opentelemetry.io/otel v1.6.3 h1:FLOfo8f9JzFVFVyU+MSRJc2HdEAXQgm7pIv2uFKRSZE=
 go.opentelemetry.io/otel v1.6.3/go.mod h1:7BgNga5fNlF/iZjG06hM3yofffp0ofKCDwSXx1GC4dI=
+go.opentelemetry.io/otel v1.7.0 h1:Z2lA3Tdch0iDcrhJXDIlC94XE+bxok1F9B+4Lz/lGsM=
+go.opentelemetry.io/otel v1.7.0/go.mod h1:5BdUoMIz5WEs0vt0CUEMtSSaTSHBBVwrhnz7+nrD5xk=
 go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.6.3 h1:nAmg1WgsUXoXf46dJG9eS/AzOcvkCTK4xJSUYpWyHYg=
 go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.6.3/go.mod h1:NEu79Xo32iVb+0gVNV8PMd7GoWqnyDXRlj04yFjqz40=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.6.3 h1:4/UjHWMVVc5VwX/KAtqJOHErKigMCH8NexChMuanb/o=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.6.3/go.mod h1:UJmXdiVVBaZ63umRUTwJuCMAV//GCMvDiQwn703/GoY=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.6.3 h1:leYDq5psbM3K4QNcZ2juCj30LjUnvxjuYQj1mkGjXFM=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.6.3/go.mod h1:ycItY/esVj8c0dKgYTOztTERXtPzcfDU/0o8EdwCjoA=
-go.opentelemetry.io/otel/sdk v1.6.1/go.mod h1:IVYrddmFZ+eJqu2k38qD3WezFR2pymCzm8tdxyh3R4E=
-go.opentelemetry.io/otel/sdk v1.6.3 h1:prSHYdwCQOX5DrsEzxowH3nLhoAzEBdZhvrR79scfLs=
 go.opentelemetry.io/otel/sdk v1.6.3/go.mod h1:A4iWF7HTXa+GWL/AaqESz28VuSBIcZ+0CV+IzJ5NMiQ=
-go.opentelemetry.io/otel/trace v1.6.1/go.mod h1:RkFRM1m0puWIq10oxImnGEduNBzxiN7TXluRBtE+5j0=
-go.opentelemetry.io/otel/trace v1.6.3 h1:IqN4L+5b0mPNjdXIiZ90Ni4Bl5BRkDQywePLWemd9bc=
+go.opentelemetry.io/otel/sdk v1.7.0 h1:4OmStpcKVOfvDOgCt7UriAPtKolwIhxpnSNI/yK+1B0=
+go.opentelemetry.io/otel/sdk v1.7.0/go.mod h1:uTEOTwaqIVuTGiJN7ii13Ibp75wJmYUDe374q6cZwUU=
 go.opentelemetry.io/otel/trace v1.6.3/go.mod h1:GNJQusJlUgZl9/TQBPKU/Y/ty+0iVB5fjhKeJGZPGFs=
+go.opentelemetry.io/otel/trace v1.7.0 h1:O37Iogk1lEkMRXewVtZ1BBTVn5JEp8GrJvP92bJqC6o=
+go.opentelemetry.io/otel/trace v1.7.0/go.mod h1:fzLSB9nqR2eXzxPXb2JW9IKE+ScyXA48yyE4TNvoHqU=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.opentelemetry.io/proto/otlp v0.15.0 h1:h0bKrvdrT/9sBwEJ6iWUqT/N/xPcS66bL4u3isneJ6w=
 go.opentelemetry.io/proto/otlp v0.15.0/go.mod h1:H7XAot3MsfNsj7EXtrA2q5xSNQ10UqI405h3+duxN4U=