diff --git a/go.mod b/go.mod
index ae93c86..0355775 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.7.0
-	github.com/sclevine/spec v1.3.0
+	github.com/sclevine/spec v1.4.0
 	golang.org/x/net v0.0.0-20190628185345-da137c7871d7 // indirect
 	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb // indirect
 	golang.org/x/text v0.3.2 // indirect
diff --git a/go.sum b/go.sum
index e00134f..57550e2 100644
--- a/go.sum
+++ b/go.sum
@@ -23,6 +23,8 @@ github.com/sclevine/spec v1.2.0 h1:1Jwdf9jSfDl9NVmt8ndHqbTZ7XCCPbh1jI3hkDBHVYA=
 github.com/sclevine/spec v1.2.0/go.mod h1:W4J29eT/Kzv7/b9IWLB055Z+qvVC9vt0Arko24q7p+U=
 github.com/sclevine/spec v1.3.0 h1:iTB51CYlnju5oRh0/l67fg1+RlQ2nqmFecwdvN+5TrI=
 github.com/sclevine/spec v1.3.0/go.mod h1:W4J29eT/Kzv7/b9IWLB055Z+qvVC9vt0Arko24q7p+U=
+github.com/sclevine/spec v1.4.0 h1:z/Q9idDcay5m5irkZ28M7PtQM4aOISzOpj4bUPkDee8=
+github.com/sclevine/spec v1.4.0/go.mod h1:LvpgJaFyvQzRvc1kaDs0bulYwzC70PbiYjC4QnFHkOM=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee h1:WG0RUwxtNT4qqaXX3DPA8zHFNm/D9xaBpxzHt1WcA/E=