diff --git a/go.mod b/go.mod
index 45b5c802..1d975c01 100644
--- a/go.mod
+++ b/go.mod
@@ -70,8 +70,9 @@ replace (
 	golang.org/x/oauth2 => golang.org/x/oauth2 v0.0.0-20170412232759-a6bd8cefa181
 	golang.org/x/sync => golang.org/x/sync v0.0.0-20181108010431-42b317875d0f
 	golang.org/x/sys => golang.org/x/sys v0.0.0-20171031081856-95c657629925
-	golang.org/x/text => golang.org/x/text v0.0.0-20170810154203-b19bf474d317
+	golang.org/x/text => golang.org/x/text v0.3.1-0.20181227161524-e6919f6577db
 	golang.org/x/time => golang.org/x/time v0.0.0-20161028155119-f51c12702a4d
+	golang.org/x/tools => golang.org/x/tools v0.0.0-20190205050122-7f7074d5bcfd
 	google.golang.org/appengine => google.golang.org/appengine v1.5.0
 	gopkg.in/check.v1 => gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
 	gopkg.in/fsnotify.v1 => gopkg.in/fsnotify.v1 v1.4.7
diff --git a/go.sum b/go.sum
index e98eae86..3a21fc72 100644
--- a/go.sum
+++ b/go.sum
@@ -64,10 +64,11 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f h1:Bl/8QSvNqXvPGPGXa2z5xUTm
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20171031081856-95c657629925 h1:nCH33NboKIsT4HoXBsXTWX8ul303HxWgkc5s2Ezwacg=
 golang.org/x/sys v0.0.0-20171031081856-95c657629925/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.0.0-20170810154203-b19bf474d317 h1:WKW+OPdYPlvOTVGHuMfjnIC6yY2SI93yFB0pZ7giBmQ=
-golang.org/x/text v0.0.0-20170810154203-b19bf474d317/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.1-0.20181227161524-e6919f6577db h1:6/JqlYfC1CCaLnGceQTI+sDGhC9UBSPAsBqI0Gun6kU=
+golang.org/x/text v0.3.1-0.20181227161524-e6919f6577db/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/time v0.0.0-20161028155119-f51c12702a4d h1:TnM+PKb3ylGmZvyPXmo9m/wktg7Jn/a/fNmr33HSj8g=
 golang.org/x/time v0.0.0-20161028155119-f51c12702a4d/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
+golang.org/x/tools v0.0.0-20190205050122-7f7074d5bcfd/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 google.golang.org/appengine v1.5.0 h1:KxkO13IPW4Lslp2bz+KHP2E3gtFlrIGNThxkZQ3g+4c=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=