diff --git a/VERSION b/VERSION
index ef538c2..ff365e0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.1.2
+3.1.3
diff --git a/etc/registry.json b/etc/registry.json
index b708921..36739a2 100644
--- a/etc/registry.json
+++ b/etc/registry.json
@@ -4,5 +4,10 @@
       "additionalType": {"subPropertyOf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"}
     }
   },
+  "https://schema.org/": {
+    "properties": {
+      "additionalType": {"subPropertyOf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"}
+    }
+  },
   "http://microformats.org/profile/hcard": {}
 }
diff --git a/spec/rdfa_reader_spec.rb b/spec/rdfa_reader_spec.rb
index a9a43cb..15058e2 100644
--- a/spec/rdfa_reader_spec.rb
+++ b/spec/rdfa_reader_spec.rb
@@ -848,6 +848,21 @@
 
         expect(parse(md, vocab_expansion: true)).to be_equivalent_graph(ttl, logger: @logger)
       end
+
+      it "always expands (schemas)" do
+        md = %q(
+          <div itemscope='' itemtype='https://schema.org/Person'>
+            <link itemprop='additionalType' href='http://xmlns.com/foaf/0.1/Person' />
+          </div>
+        )
+        ttl = %q(
+          [ a <https://schema.org/Person>, <http://xmlns.com/foaf/0.1/Person>;
+            <https://schema.org/additionalType> <http://xmlns.com/foaf/0.1/Person>
+          ] .
+        )
+
+        expect(parse(md, vocab_expansion: true)).to be_equivalent_graph(ttl, logger: @logger)
+      end
     end
 
     context "test-files", skip: true do
diff --git a/spec/reader_spec.rb b/spec/reader_spec.rb
index b56ed18..ec81af6 100644
--- a/spec/reader_spec.rb
+++ b/spec/reader_spec.rb
@@ -858,6 +858,21 @@
 
         expect(parse(md, vocab_expansion: true)).to be_equivalent_graph(ttl, logger: @logger)
       end
+
+      it "always expands (schemas)" do
+        md = %q(
+          <div itemscope='' itemtype='https://schema.org/Person'>
+            <link itemprop='additionalType' href='http://xmlns.com/foaf/0.1/Person' />
+          </div>
+        )
+        ttl = %q(
+          [ a <https://schema.org/Person>, <http://xmlns.com/foaf/0.1/Person>;
+            <https://schema.org/additionalType> <http://xmlns.com/foaf/0.1/Person>
+          ] .
+        )
+
+        expect(parse(md, vocab_expansion: true)).to be_equivalent_graph(ttl, logger: @logger)
+      end
     end
 
     context "test-files" do
diff --git a/spec/test-files/test-registry.json b/spec/test-files/test-registry.json
index 54aabf6..52d24a6 100644
--- a/spec/test-files/test-registry.json
+++ b/spec/test-files/test-registry.json
@@ -12,6 +12,11 @@
       "additionalType": {"subPropertyOf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"}
     }
   },
+  "https://schema.org/": {
+    "properties": {
+      "additionalType": {"subPropertyOf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"}
+    }
+  },
   "http://microformats.org/profile/hcard": {},
   "http://vocabulary.unordered/": {
     "propertyURI":    "vocabulary",