diff --git a/go.mod b/go.mod
index 68f1ca4..cb5c6dc 100644
--- a/go.mod
+++ b/go.mod
@@ -4,9 +4,9 @@ go 1.12
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/stretchr/testify v1.3.0 // indirect
-	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
-	golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa // indirect
+	github.com/stretchr/testify v1.4.0 // indirect
+	golang.org/x/crypto v0.0.0-20190826192413-60c769a6c586
+	golang.org/x/sys v0.0.0-20190826192413-c7b8b68b1456 // indirect
 	gopkg.in/square/go-jose.v2 v2.3.1
 	gopkg.in/urfave/cli.v2 v2.0.0-20190806201727-b62605953717
 )
diff --git a/go.sum b/go.sum
index 448c9e1..3f3ad11 100644
--- a/go.sum
+++ b/go.sum
@@ -7,17 +7,23 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4 h1:HuIa8hRrWRSrqYzx1qI49NNxhdi2PrY7gxVSq1JjLDc=
 golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20190826192413-60c769a6c586 h1:Jq/zKs+EgpLN+9NXW5Gdbnjn3UdRbuRPjeMtdCC9vaI=
+golang.org/x/crypto v0.0.0-20190826192413-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa h1:KIDDMLT1O0Nr7TSxp8xM5tJcdn8tgyAONntO829og1M=
 golang.org/x/sys v0.0.0-20190804053845-51ab0e2deafa/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190826192413-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/square/go-jose.v2 v2.3.1 h1:SK5KegNXmKmqE342YYN2qPHEnUYeoMiXXl1poUlI+o4=
 gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
 gopkg.in/urfave/cli.v2 v2.0.0-20190806201727-b62605953717 h1:OvXt/p4cdwNl+mwcWMq/AxaKFkhdxcjx+tx+qf4EOvY=
 gopkg.in/urfave/cli.v2 v2.0.0-20190806201727-b62605953717/go.mod h1:cKXr3E0k4aosgycml1b5z33BVV6hai1Kh7uDgFOkbcs=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=