diff --git a/lib/docker_registry2.rb b/lib/docker_registry2.rb
index a7740e5..b29f068 100644
--- a/lib/docker_registry2.rb
+++ b/lib/docker_registry2.rb
@@ -22,4 +22,8 @@ def self.tags(repository)
   def self.manifest(repository, tag)
     @reg.manifest(repository, tag)
   end
+
+  def self.manifest_digest(repository, tag)
+    @reg.manifest_digest(repository, tag)
+  end
 end
diff --git a/lib/registry/registry.rb b/lib/registry/registry.rb
index edbbffe..5f804e0 100644
--- a/lib/registry/registry.rb
+++ b/lib/registry/registry.rb
@@ -126,6 +126,14 @@ def blob(repo, digest, outpath = nil)
       end
     end
 
+    def manifest_digest(repo, tag)
+      tag_path = "/v2/#{repo}/manifests/#{tag}"
+      dohead(tag_path).headers[:docker_content_digest]
+    rescue DockerRegistry2::InvalidMethod
+      # Pre-2.3.0 registries didn't support manifest HEAD requests
+      doget(tag_path).headers[:docker_content_digest]
+    end
+
     def digest(image, tag, architecture = nil, os = nil, variant = nil)
       manifest = manifest(image, tag)
       parsed_manifest = JSON.parse(manifest.body)