diff --git a/packages/openapi3-parser/lib/parser/oas/parseInfoObject.js b/packages/openapi3-parser/lib/parser/oas/parseInfoObject.js
index fb9ca11bb..d05913bf4 100644
--- a/packages/openapi3-parser/lib/parser/oas/parseInfoObject.js
+++ b/packages/openapi3-parser/lib/parser/oas/parseInfoObject.js
@@ -2,6 +2,7 @@ const R = require('ramda');
 const { createError } = require('../../elements');
 const {
   createInvalidMemberWarning,
+  createUnsupportedMemberWarning,
 } = require('../annotations');
 const {
   isObject, hasKey, getValue, isExtension,
@@ -16,6 +17,9 @@ const parseContactObject = require('./parseContactObject');
 const name = 'Info Object';
 const requiredKeys = ['title', 'version'];
 
+const unsupported31Keys = ['summary'];
+const isUnsupported31Key = R.anyPass(R.map(hasKey, unsupported31Keys));
+
 /**
  * Returns whether the given member element is unsupported
  * @param member {MemberElement}
@@ -55,6 +59,14 @@ function parseInfo(context, info) {
     // FIXME Support exposing extensions into parse result
     [isExtension, () => new namespace.elements.ParseResult()],
 
+    [
+      R.both(
+        isUnsupported31Key,
+        R.always(context.isOpenAPIVersionMoreThanOrEqual(3, 1))
+      ),
+      createUnsupportedMemberWarning(context.namespace, name),
+    ],
+
     // Return a warning for additional properties
     [R.T, createInvalidMemberWarning(namespace, name)],
   ]);
diff --git a/packages/openapi3-parser/lib/parser/oas/parseLicenseObject.js b/packages/openapi3-parser/lib/parser/oas/parseLicenseObject.js
index 128322060..061956b59 100644
--- a/packages/openapi3-parser/lib/parser/oas/parseLicenseObject.js
+++ b/packages/openapi3-parser/lib/parser/oas/parseLicenseObject.js
@@ -3,6 +3,7 @@ const R = require('ramda');
 const { createWarning } = require('../../elements');
 const {
   createInvalidMemberWarning,
+  createUnsupportedMemberWarning,
 } = require('../annotations');
 const {
   isObject, hasKey, isExtension,
@@ -14,10 +15,20 @@ const pipeParseResult = require('../../pipeParseResult');
 const name = 'License Object';
 const requiredKeys = ['name'];
 
+const unsupported31Keys = ['identifier'];
+const isUnsupported31Key = R.anyPass(R.map(hasKey, unsupported31Keys));
+
 const parseMember = context => R.cond([
   [hasKey('name'), parseString(context, name, false)],
   [hasKey('url'), parseString(context, name, false)],
   [isExtension, () => new context.namespace.elements.ParseResult()],
+  [
+    R.both(
+      isUnsupported31Key,
+      R.always(context.isOpenAPIVersionMoreThanOrEqual(3, 1))
+    ),
+    createUnsupportedMemberWarning(context.namespace, name),
+  ],
   [R.T, createInvalidMemberWarning(context.namespace, name)],
 ]);
 
diff --git a/packages/openapi3-parser/test/unit/parser/oas/parseInfoObject-test.js b/packages/openapi3-parser/test/unit/parser/oas/parseInfoObject-test.js
index 68853e1eb..5f73a158b 100644
--- a/packages/openapi3-parser/test/unit/parser/oas/parseInfoObject-test.js
+++ b/packages/openapi3-parser/test/unit/parser/oas/parseInfoObject-test.js
@@ -97,6 +97,19 @@ describe('#parseInfoObject', () => {
       expect(parseResult).to.not.contain.annotations;
     });
 
+    it('provides warning for unsupported OpenAPI 3.1 keys', () => {
+      context.openapiVersion = { major: 3, minor: 1 };
+      const object = new namespace.elements.Object({
+        title: 'My API',
+        version: '1.0.0',
+        summary: '',
+      });
+
+      const parseResult = parse(context, object);
+
+      expect(parseResult).to.contain.warning("'Info Object' contains unsupported key 'summary'");
+    });
+
     it('provides warning for invalid keys', () => {
       const object = new namespace.elements.Object({
         title: 'My API',
diff --git a/packages/openapi3-parser/test/unit/parser/oas/parseLicenseObject-test.js b/packages/openapi3-parser/test/unit/parser/oas/parseLicenseObject-test.js
index e424ead02..08846fa53 100644
--- a/packages/openapi3-parser/test/unit/parser/oas/parseLicenseObject-test.js
+++ b/packages/openapi3-parser/test/unit/parser/oas/parseLicenseObject-test.js
@@ -69,6 +69,18 @@ describe('#parseLicenseObject', () => {
       expect(parseResult).to.not.contain.annotations;
     });
 
+    it('provides warning for unsupported OpenAPI 3.1 keys', () => {
+      context.openapiVersion = { major: 3, minor: 1 };
+      const object = new namespace.elements.Object({
+        name: 'Apache 2.0',
+        identifier: 'MIT',
+      });
+
+      const parseResult = parse(context)(object);
+
+      expect(parseResult).to.contain.warning("'License Object' contains unsupported key 'identifier'");
+    });
+
     it('provides warning for invalid keys', () => {
       const object = new namespace.elements.Object({
         name: 'Apache 2.0',