diff --git a/go.mod b/go.mod
index e7cff7a..f428436 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,6 @@ require (
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/stretchr/testify v1.6.1 // indirect
 	golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8 // indirect
-	golang.org/x/net v0.0.0-20180729183719-c4299a1a0d85 // indirect
-	golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f
+	golang.org/x/sync v0.2.0
 	gopkg.in/square/go-jose.v2 v2.6.0
 )
diff --git a/go.sum b/go.sum
index d4cd164..a5730dd 100644
--- a/go.sum
+++ b/go.sum
@@ -11,10 +11,8 @@ github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8 h1:h7zdf0RiEvWbYBKIx4b+q41xoUVnMmvsGZnIVE5syG8=
 golang.org/x/crypto v0.0.0-20180621125126-a49355c7e3f8/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/net v0.0.0-20180729183719-c4299a1a0d85 h1:L8D6kGKB6IflRbLijfnSTkgmss6PZ/Q2MG7XefweZB4=
-golang.org/x/net v0.0.0-20180729183719-c4299a1a0d85/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
-golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.2.0 h1:PUR+T4wwASmuSTYdKjYHI5TD22Wy5ogLU5qZCOLxBrI=
+golang.org/x/sync v0.2.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=