diff --git a/go.mod b/go.mod
index 0c9a722..aa0662f 100644
--- a/go.mod
+++ b/go.mod
@@ -2,9 +2,8 @@ module github.com/Code-Hex/Neo-cowsay/v2
 
 require (
 	github.com/Code-Hex/go-wordwrap v1.0.0
-	github.com/google/go-cmp v0.5.6
+	github.com/google/go-cmp v0.5.9
 	github.com/mattn/go-runewidth v0.0.13
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )
 
 go 1.16
diff --git a/go.sum b/go.sum
index 0300f5d..e536bb3 100644
--- a/go.sum
+++ b/go.sum
@@ -1,12 +1,9 @@
 github.com/Code-Hex/go-wordwrap v1.0.0 h1:yl5fLyZEz3+hPGbpTRlTQ8mQJ1HXWcTq1FCNR1ch6zM=
 github.com/Code-Hex/go-wordwrap v1.0.0/go.mod h1:/SsbgkY2Q0aPQRyvXcyQwWYTQOIwSORKe6MPjRVGIWU=
-github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
-github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+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/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-runewidth v0.0.13 h1:lTGmDsbAYt5DmK6OnoV7EuIF1wEIFAcxld6ypU4OSgU=
 github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=