diff --git a/go.mod b/go.mod
index cec92df5..28f0f283 100644
--- a/go.mod
+++ b/go.mod
@@ -24,7 +24,7 @@ require (
 	github.com/mattn/go-isatty v0.0.4 // indirect
 	github.com/mtrmac/gpgme v0.0.0-20170102180018-b2432428689c // indirect
 	github.com/opencontainers/go-digest v1.0.0-rc1
-	github.com/opencontainers/image-spec v0.0.0-20180918080442-7b1e489870ac
+	github.com/opencontainers/image-spec v1.0.0-rc6.0.20190823105129-775207bd45b6
 	github.com/opencontainers/image-tools v0.0.0-20170926011501-6d941547fa1d
 	github.com/opencontainers/runtime-spec v1.0.0 // indirect
 	github.com/pborman/uuid v0.0.0-20160209185913-a97ce2ca70fa // indirect
diff --git a/go.sum b/go.sum
index 62c7c84e..328643d6 100644
--- a/go.sum
+++ b/go.sum
@@ -93,6 +93,9 @@ github.com/opencontainers/go-digest v1.0.0-rc1 h1:WzifXhOVOEOuFYOJAW6aQqW0TooG2i
 github.com/opencontainers/go-digest v1.0.0-rc1/go.mod h1:cMLVZDEM3+U2I4VmLI6N8jQYUd2OVphdqWwCJHrFt2s=
 github.com/opencontainers/image-spec v0.0.0-20180918080442-7b1e489870ac h1:Y0AqP4onEqgQST60GE172L61SAFMZMHQgXbwLMyj418=
 github.com/opencontainers/image-spec v0.0.0-20180918080442-7b1e489870ac/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
+github.com/opencontainers/image-spec v1.0.0-rc6.0.20190823105129-775207bd45b6 h1:ei890tQPW79pEqhXh5KhTjjFndyo/Xrmn1h1HjiVO/g=
+github.com/opencontainers/image-spec v1.0.0-rc6.0.20190823105129-775207bd45b6/go.mod h1:BtxoFyWECRxE4U/7sNtV5W15zMzWCbyJoFRP3s7yZA0=
+github.com/opencontainers/image-spec v1.0.1 h1:JMemWkRwHx4Zj+fVxWoMCFm/8sYGGrUVojFA6h/TRcI=
 github.com/opencontainers/image-tools v0.0.0-20170926011501-6d941547fa1d h1:X9WSFjjZNqYRqO2MenUgqE2nj/oydcfIzXJ0R/SVnnA=
 github.com/opencontainers/image-tools v0.0.0-20170926011501-6d941547fa1d/go.mod h1:A9btVpZLzttF4iFaKNychhPyrhfOjJ1OF5KrA8GcLj4=
 github.com/opencontainers/runc v1.0.0-rc6 h1:7AoN22rYxxkmsJS48wFaziH/n0OvrZVqL/TglgHKbKQ=
diff --git a/vendor/github.com/opencontainers/image-spec/schema/loader.go b/vendor/github.com/opencontainers/image-spec/schema/loader.go
index c6bde004..f1717659 100644
--- a/vendor/github.com/opencontainers/image-spec/schema/loader.go
+++ b/vendor/github.com/opencontainers/image-spec/schema/loader.go
@@ -59,7 +59,7 @@ func (factory *fsLoaderFactory) refContents(ref gojsonreference.JsonReference) (
 		}
 	}
 	if path == "" {
-		return nil, fmt.Errorf("Schema reference %#v unexpectedly not available in fsLoaderFactory with namespaces %#v", path, factory.namespaces)
+		return nil, fmt.Errorf("schema reference %#v unexpectedly not available in fsLoaderFactory with namespaces %#v", path, factory.namespaces)
 	}
 
 	f, err := factory.fs.Open(path)
diff --git a/vendor/github.com/opencontainers/image-spec/schema/validator.go b/vendor/github.com/opencontainers/image-spec/schema/validator.go
index 029217c3..545ade22 100644
--- a/vendor/github.com/opencontainers/image-spec/schema/validator.go
+++ b/vendor/github.com/opencontainers/image-spec/schema/validator.go
@@ -117,8 +117,10 @@ func validateManifest(r io.Reader) error {
 	for _, layer := range header.Layers {
 		if layer.MediaType != string(v1.MediaTypeImageLayer) &&
 			layer.MediaType != string(v1.MediaTypeImageLayerGzip) &&
+			layer.MediaType != string(v1.MediaTypeImageLayerZstd) &&
 			layer.MediaType != string(v1.MediaTypeImageLayerNonDistributable) &&
-			layer.MediaType != string(v1.MediaTypeImageLayerNonDistributableGzip) {
+			layer.MediaType != string(v1.MediaTypeImageLayerNonDistributableGzip) &&
+			layer.MediaType != string(v1.MediaTypeImageLayerNonDistributableZstd) {
 			fmt.Printf("warning: layer %s has an unknown media type: %s\n", layer.Digest, layer.MediaType)
 		}
 	}
diff --git a/vendor/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go b/vendor/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go
index bad7bb97..4f35ac13 100644
--- a/vendor/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go
+++ b/vendor/github.com/opencontainers/image-spec/specs-go/v1/mediatype.go
@@ -34,6 +34,10 @@ const (
 	// referenced by the manifest.
 	MediaTypeImageLayerGzip = "application/vnd.oci.image.layer.v1.tar+gzip"
 
+	// MediaTypeImageLayerZstd is the media type used for zstd compressed
+	// layers referenced by the manifest.
+	MediaTypeImageLayerZstd = "application/vnd.oci.image.layer.v1.tar+zstd"
+
 	// MediaTypeImageLayerNonDistributable is the media type for layers referenced by
 	// the manifest but with distribution restrictions.
 	MediaTypeImageLayerNonDistributable = "application/vnd.oci.image.layer.nondistributable.v1.tar"
@@ -43,6 +47,11 @@ const (
 	// restrictions.
 	MediaTypeImageLayerNonDistributableGzip = "application/vnd.oci.image.layer.nondistributable.v1.tar+gzip"
 
+	// MediaTypeImageLayerNonDistributableZstd is the media type for zstd
+	// compressed layers referenced by the manifest but with distribution
+	// restrictions.
+	MediaTypeImageLayerNonDistributableZstd = "application/vnd.oci.image.layer.nondistributable.v1.tar+zstd"
+
 	// MediaTypeImageConfig specifies the media type for the image configuration.
 	MediaTypeImageConfig = "application/vnd.oci.image.config.v1+json"
 )
diff --git a/vendor/github.com/opencontainers/image-spec/specs-go/version.go b/vendor/github.com/opencontainers/image-spec/specs-go/version.go
index e3f88c15..58f1095a 100644
--- a/vendor/github.com/opencontainers/image-spec/specs-go/version.go
+++ b/vendor/github.com/opencontainers/image-spec/specs-go/version.go
@@ -22,7 +22,7 @@ const (
 	// VersionMinor is for functionality in a backwards-compatible manner
 	VersionMinor = 0
 	// VersionPatch is for backwards-compatible bug fixes
-	VersionPatch = 0
+	VersionPatch = 1
 
 	// VersionDev indicates development branch. Releases will be empty string.
 	VersionDev = "-dev"
diff --git a/vendor/modules.txt b/vendor/modules.txt
index c9313e6f..0ca9d3fd 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -190,7 +190,7 @@ github.com/mistifyio/go-zfs
 github.com/mtrmac/gpgme
 # github.com/opencontainers/go-digest v1.0.0-rc1
 github.com/opencontainers/go-digest
-# github.com/opencontainers/image-spec v0.0.0-20180918080442-7b1e489870ac
+# github.com/opencontainers/image-spec v1.0.0-rc6.0.20190823105129-775207bd45b6
 github.com/opencontainers/image-spec/specs-go/v1
 github.com/opencontainers/image-spec/specs-go
 github.com/opencontainers/image-spec/schema