diff --git a/vendor/github.com/containers/image/copy/copy.go b/vendor/github.com/containers/image/copy/copy.go
index 4656fca5..a8673c01 100644
--- a/vendor/github.com/containers/image/copy/copy.go
+++ b/vendor/github.com/containers/image/copy/copy.go
@@ -212,14 +212,14 @@ func copyLayers(manifestUpdates *types.ManifestUpdateOptions, dest types.ImageDe
 	canModifyManifest bool, reportWriter io.Writer) error {
 	type copiedLayer struct {
 		blobInfo types.BlobInfo
-		diffID   string
+		diffID   digest.Digest
 	}
 
 	diffIDsAreNeeded := src.UpdatedImageNeedsLayerDiffIDs(*manifestUpdates)
 
 	srcInfos := src.LayerInfos()
 	destInfos := []types.BlobInfo{}
-	diffIDs := []string{}
+	diffIDs := []digest.Digest{}
 	copiedLayers := map[digest.Digest]copiedLayer{}
 	for _, srcLayer := range srcInfos {
 		cl, ok := copiedLayers[srcLayer.Digest]
@@ -229,7 +229,7 @@ func copyLayers(manifestUpdates *types.ManifestUpdateOptions, dest types.ImageDe
 			if err != nil {
 				return err
 			}
-			cl = copiedLayer{blobInfo: destInfo, diffID: diffID.String()}
+			cl = copiedLayer{blobInfo: destInfo, diffID: diffID}
 			copiedLayers[srcLayer.Digest] = cl
 		}
 		destInfos = append(destInfos, cl.blobInfo)
diff --git a/vendor/github.com/containers/image/docker/daemon/daemon_types.go b/vendor/github.com/containers/image/docker/daemon/daemon_types.go
index 0f933ed6..c1bb9caa 100644
--- a/vendor/github.com/containers/image/docker/daemon/daemon_types.go
+++ b/vendor/github.com/containers/image/docker/daemon/daemon_types.go
@@ -22,7 +22,7 @@ type manifestItem struct {
 }
 
 type imageID string
-type diffID string
+type diffID digest.Digest
 
 // Based on github.com/docker/distribution/blobs.go
 type distributionDescriptor struct {
diff --git a/vendor/github.com/containers/image/image/docker_schema1.go b/vendor/github.com/containers/image/image/docker_schema1.go
index c0f2f467..587ea50f 100644
--- a/vendor/github.com/containers/image/image/docker_schema1.go
+++ b/vendor/github.com/containers/image/image/docker_schema1.go
@@ -236,7 +236,7 @@ func validateV1ID(id string) error {
 }
 
 // Based on github.com/docker/docker/distribution/pull_v2.go
-func (m *manifestSchema1) convertToManifestSchema2(uploadedLayerInfos []types.BlobInfo, layerDiffIDs []string) (types.Image, error) {
+func (m *manifestSchema1) convertToManifestSchema2(uploadedLayerInfos []types.BlobInfo, layerDiffIDs []digest.Digest) (types.Image, error) {
 	if len(m.History) == 0 {
 		// What would this even mean?! Anyhow, the rest of the code depends on fsLayers[0] and history[0] existing.
 		return nil, fmt.Errorf("Cannot convert an image with 0 history entries to %s", manifest.DockerV2Schema2MediaType)
@@ -253,7 +253,7 @@ func (m *manifestSchema1) convertToManifestSchema2(uploadedLayerInfos []types.Bl
 
 	rootFS := rootFS{
 		Type:      "layers",
-		DiffIDs:   []string{},
+		DiffIDs:   []digest.Digest{},
 		BaseLayer: "",
 	}
 	var layers []descriptor
diff --git a/vendor/github.com/containers/image/image/manifest.go b/vendor/github.com/containers/image/image/manifest.go
index 351bf515..0f3b9411 100644
--- a/vendor/github.com/containers/image/image/manifest.go
+++ b/vendor/github.com/containers/image/image/manifest.go
@@ -3,6 +3,7 @@ package image
 import (
 	"time"
 
+	"github.com/docker/distribution/digest"
 	"github.com/docker/engine-api/types/strslice"
 
 	"github.com/containers/image/manifest"
@@ -46,9 +47,9 @@ type imageHistory struct {
 }
 
 type rootFS struct {
-	Type      string   `json:"type"`
-	DiffIDs   []string `json:"diff_ids,omitempty"`
-	BaseLayer string   `json:"base_layer,omitempty"`
+	Type      string          `json:"type"`
+	DiffIDs   []digest.Digest `json:"diff_ids,omitempty"`
+	BaseLayer string          `json:"base_layer,omitempty"`
 }
 
 // genericManifest is an interface for parsing, modifying image manifests and related data.
diff --git a/vendor/github.com/containers/image/types/types.go b/vendor/github.com/containers/image/types/types.go
index 313642ef..d0a7c0ed 100644
--- a/vendor/github.com/containers/image/types/types.go
+++ b/vendor/github.com/containers/image/types/types.go
@@ -221,7 +221,7 @@ type ManifestUpdateOptions struct {
 type ManifestUpdateInformation struct {
 	Destination  ImageDestination // and yes, UpdatedManifest may write to Destination (see the schema2 → schema1 conversion logic in image/docker_schema2.go)
 	LayerInfos   []BlobInfo       // Complete BlobInfos (size+digest) which have been uploaded, in order (the root layer first, and then successive layered layers)
-	LayerDiffIDs []string         // Digest values for the _uncompressed_ contents of the blobs which have been uploaded, in the same order.
+	LayerDiffIDs []digest.Digest  // Digest values for the _uncompressed_ contents of the blobs which have been uploaded, in the same order.
 }
 
 // ImageInspectInfo is a set of metadata describing Docker images, primarily their manifest and configuration.