diff --git a/go.mod b/go.mod
index f96c3d9..e006f9c 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,6 @@ require (
 	github.com/BurntSushi/toml v0.3.1 // indirect
 	github.com/dustin/go-humanize v1.0.0
 	github.com/googleapis/gax-go v0.0.0-20161107002406-da06d194a00e // indirect
-	github.com/h2non/filetype v1.0.9
 	golang.org/x/net v0.0.0-20190603091049-60506f45cf65
 	golang.org/x/oauth2 v0.0.0-20161130174631-f6093e37b6cb
 	google.golang.org/api v0.0.0-20180811000443-0aa0a1f2c0c4
diff --git a/go.sum b/go.sum
index 3329bc8..57fdf03 100644
--- a/go.sum
+++ b/go.sum
@@ -8,8 +8,6 @@ github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/googleapis/gax-go v0.0.0-20161107002406-da06d194a00e h1:CYRpN206UTHUinz3VJoLaBdy1gEGeJNsqT0mvswDcMw=
 github.com/googleapis/gax-go v0.0.0-20161107002406-da06d194a00e/go.mod h1:SFVmujtThgffbyetf+mdk2eWhX2bMyUtNHzFKcPA9HY=
-github.com/h2non/filetype v1.0.9 h1:Y9YFg/WJNd7XoC5h3WD+GZSxHmuRRDyJQ7fcIlIJplI=
-github.com/h2non/filetype v1.0.9/go.mod h1:isekKqOuhMj+s/7r3rIeTErIRy4Rub5uBWHfvMusLMU=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=