diff --git a/go.mod b/go.mod
index e242f04..80ee007 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/aligator/go.clipper v0.0.0-20200424185851-fc8a51077d44
 	github.com/ctessum/geom v0.2.10 // indirect
 	github.com/furstenheim/go-convex-hull-2d v0.0.0-20181121204724-08788ab09726
-	github.com/google/go-cmp v0.5.9
+	github.com/google/go-cmp v0.6.0
 	github.com/hschendel/stl v1.0.4
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.6.1 // indirect
diff --git a/go.sum b/go.sum
index 7753257..7457041 100644
--- a/go.sum
+++ b/go.sum
@@ -21,8 +21,8 @@ github.com/gonum/floats v0.0.0-20181209220543-c233463c7e82 h1:EvokxLQsaaQjcWVWSV
 github.com/gonum/floats v0.0.0-20181209220543-c233463c7e82/go.mod h1:PxC8OnwL11+aosOB5+iEPoV3picfs8tUpkVd0pDo+Kg=
 github.com/gonum/internal v0.0.0-20181124074243-f884aa714029 h1:8jtTdc+Nfj9AR+0soOeia9UZSvYBvETVHZrugUowJ7M=
 github.com/gonum/internal v0.0.0-20181124074243-f884aa714029/go.mod h1:Pu4dmpkhSyOzRwuXkOgAvijx4o+4YMUJJo9OvPYMkks=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/hschendel/stl v1.0.4 h1:DXT5rkiXMUkbKw4Ndi1OYZ/a5SLR35TzxGj46p5Qyf8=
 github.com/hschendel/stl v1.0.4/go.mod h1:XQFFLKrq9YTaBpmouDui4JSaxMyAYkpD7elGSSj/y3M=
 github.com/jonas-p/go-shp v0.1.2-0.20190401125246-9fd306ae10a6/go.mod h1:MRIhyxDQ6VVp0oYeD7yPGr5RSTNScUFKCDsI5DR7PtI=