diff --git a/go.mod b/go.mod
index c3f06a3..3f41de0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/openrelayxyz/plugeth-utils
 
-go 1.16
+go 1.18
 
 require (
 	github.com/btcsuite/btcd/btcec/v2 v2.1.2
@@ -8,9 +8,15 @@ require (
 	github.com/google/gofuzz v1.1.1-0.20200604201612-c04b05f3adfa
 	github.com/holiman/uint256 v1.2.0
 	github.com/jedisct1/go-minisign v0.0.0-20190909160543-45766022959e
-	github.com/kr/pretty v0.1.0 // indirect
 	github.com/stretchr/testify v1.7.0
 	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
 	golang.org/x/sys v0.0.0-20210420205809-ac73e9fd8988
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+)
+
+require (
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
 )
diff --git a/go.sum b/go.sum
index ea9c2e9..de588f8 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,5 @@
 github.com/btcsuite/btcd/btcec/v2 v2.1.2 h1:YoYoC9J0jwfukodSBMzZYUVQ8PTiYg4BnOWiJVzTmLs=
 github.com/btcsuite/btcd/btcec/v2 v2.1.2/go.mod h1:ctjw4H1kknNJmRN4iP1R7bTQ+v3GJkZBd6mui8ZsAZE=
-github.com/btcsuite/btcd/chaincfg/chainhash v1.0.0/go.mod h1:7SFka0XMvUgj3hfZtydOrQY2mwhPclbT2snogU7SQQc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=