diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b2fa01d..390efae 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.7', '3.8', '3.9' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
     name: Python ${{ matrix.python-version }} sample
     steps:
       - uses: actions/checkout@v2
diff --git a/schema/iiif_3_0.json b/schema/iiif_3_0.json
index ea1bad9..10fe51a 100644
--- a/schema/iiif_3_0.json
+++ b/schema/iiif_3_0.json
@@ -1122,6 +1122,7 @@
                                         ]
                                     },
                                     { "$ref": "#/classes/range" },
+                                    { "$ref": "#/classes/canvasRef" },
                                     { "$ref": "#/classes/canvasRef" }
                                 ]
                             }
diff --git a/setup.py b/setup.py
index 371d664..89572a9 100644
--- a/setup.py
+++ b/setup.py
@@ -28,13 +28,15 @@ def run(self):
     name='iiif-presentation-validator',
     version='0.0.3',
     scripts=['iiif-presentation-validator.py'],
+    packages=['schema'],
     classifiers=["Development Status :: 4 - Beta",
                  "Intended Audience :: Developers",
                  "Operating System :: OS Independent",
                  "Programming Language :: Python",
-                 "Programming Language :: Python :: 3.7",
                  "Programming Language :: Python :: 3.8",
                  "Programming Language :: Python :: 3.9",
+                 "Programming Language :: Python :: 3.10",
+                 "Programming Language :: Python :: 3.11",
                  "Topic :: Internet :: WWW/HTTP",
                  "Topic :: Multimedia :: Graphics :: Graphics Conversion",
                  "Topic :: Software Development :: "