diff --git a/go.sum b/go.sum
index 0f3c095..83ab2ee 100644
--- a/go.sum
+++ b/go.sum
@@ -35,8 +35,6 @@ github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEW
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/logger v1.0.1 h1:Jtq7/44yDwUXMaLTYgXFC31zpm6Oku7OI/k4//yVANQ=
-github.com/google/logger v1.0.1/go.mod h1:w7O8nrRr0xufejBlQMI83MXqRusvREoJdaAxV+CoAB4=
 github.com/google/logger v1.1.0 h1:saB74Etb4EAJNH3z74CVbCKk75hld/8T0CsXKetWCwM=
 github.com/google/logger v1.1.0/go.mod h1:w7O8nrRr0xufejBlQMI83MXqRusvREoJdaAxV+CoAB4=
 github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
@@ -83,12 +81,6 @@ github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c h1:u40Z8hqBAAQyv+vATcGgV
 github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhemzwFU4jHLhdvlE6uDZjXFejJXr49I=
 github.com/xdg/stringprep v0.0.0-20180714160509-73f8eece6fdc h1:n+nNi93yXLkJvKwXNP9d55HC7lGK4H/SRcwB5IaUZLo=
 github.com/xdg/stringprep v0.0.0-20180714160509-73f8eece6fdc/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
-go.mongodb.org/mongo-driver v1.3.1 h1:op56IfTQiaY2679w922KVWa3qcHdml2K/Io8ayAOUEQ=
-go.mongodb.org/mongo-driver v1.3.1/go.mod h1:MSWZXKOynuguX+JSvwP8i+58jYCXxbia8HS3gZBapIE=
-go.mongodb.org/mongo-driver v1.3.2 h1:IYppNjEV/C+/3VPbhHVxQ4t04eVW0cLp0/pNdW++6Ug=
-go.mongodb.org/mongo-driver v1.3.2/go.mod h1:MSWZXKOynuguX+JSvwP8i+58jYCXxbia8HS3gZBapIE=
-go.mongodb.org/mongo-driver v1.3.3 h1:9kX7WY6sU/5qBuhm5mdnNWdqaDAQKB2qSZOd5wMEPGQ=
-go.mongodb.org/mongo-driver v1.3.3/go.mod h1:MSWZXKOynuguX+JSvwP8i+58jYCXxbia8HS3gZBapIE=
 go.mongodb.org/mongo-driver v1.3.4 h1:zs/dKNwX0gYUtzwrN9lLiR15hCO0nDwQj5xXx+vjCdE=
 go.mongodb.org/mongo-driver v1.3.4/go.mod h1:MSWZXKOynuguX+JSvwP8i+58jYCXxbia8HS3gZBapIE=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=