diff --git a/Pipfile b/Pipfile
index 6ac485c9..c90dc5b4 100644
--- a/Pipfile
+++ b/Pipfile
@@ -7,7 +7,7 @@ name = "pypi"
 sphinx = "<2.0.0"
 sphinx-bootstrap-theme = "*"
 jsonschema = "*"
-jschon = "0.6.0"
+jschon = "0.7.3"
 
 [dev-packages]
 
diff --git a/Pipfile.lock b/Pipfile.lock
index 6b752801..94841087 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "110b950a67f2f964ae4b16fe1f2e6bcb8b8c1b5881a3bbf6e8f4500d33e78814"
+            "sha256": "f52f5d469be4f12821db40fdf85dde48e45850d38e45c4d8473142410b640dd5"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -41,18 +41,18 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee",
-                "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"
+                "sha256:78884e7c1d4b00ce3cea67b44566851c4343c120abd683433ce934a68ea58872",
+                "sha256:d62a0163eb4c2344ac042ab2bdf75399a71a2d8c7d47eac2e2ee91b9d6339569"
             ],
-            "version": "==2021.5.30"
+            "version": "==2021.10.8"
         },
         "charset-normalizer": {
             "hashes": [
-                "sha256:88fce3fa5b1a84fdcb3f603d889f723d1dd89b26059d0123ca435570e848d5e1",
-                "sha256:c46c3ace2d744cfbdebceaa3c19ae691f53ae621b39fd7570f59d14fb7f2fd12"
+                "sha256:1eecaa09422db5be9e29d7fc65664e6c33bd06f9ced7838578ba40d58bdf3721",
+                "sha256:b0b883e8e874edfdece9c28f314e3dd5badf067342e42fb162203335ae61aa2c"
             ],
             "markers": "python_version >= '3'",
-            "version": "==2.0.3"
+            "version": "==2.0.9"
         },
         "docutils": {
             "hashes": [
@@ -64,75 +64,118 @@
         },
         "idna": {
             "hashes": [
-                "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a",
-                "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"
+                "sha256:84d9dd047ffa80596e0f246e2eab0b391788b0503584e8945f2368256d2735ff",
+                "sha256:9d643ff0a55b762d5cdb124b8eaa99c66322e2157b69160bc32796e824360e6d"
             ],
             "markers": "python_version >= '3'",
-            "version": "==3.2"
+            "version": "==3.3"
         },
         "imagesize": {
             "hashes": [
-                "sha256:6965f19a6a2039c7d48bca7dba2473069ff854c36ae6f19d2cde309d998228a1",
-                "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"
+                "sha256:1db2f82529e53c3e929e8926a1fa9235aa82d0bd0c580359c67ec31b2fddaa8c",
+                "sha256:cd1750d452385ca327479d45b64d9c7729ecf0b3969a58148298c77092261f9d"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==1.2.0"
+            "version": "==1.3.0"
+        },
+        "importlib-resources": {
+            "hashes": [
+                "sha256:33a95faed5fc19b4bc16b29a6eeae248a3fe69dd55d4d229d2b480e23eeaad45",
+                "sha256:d756e2f85dd4de2ba89be0b21dba2a3bbec2e871a42a3a16719258a11f87506b"
+            ],
+            "markers": "python_version < '3.9'",
+            "version": "==5.4.0"
         },
         "jinja2": {
             "hashes": [
-                "sha256:1f06f2da51e7b56b8f238affdd6b4e2c61e39598a378cc49345bc1bd42a978a4",
-                "sha256:703f484b47a6af502e743c9122595cc812b0271f661722403114f71a79d0f5a4"
+                "sha256:077ce6014f7b40d03b47d1f1ca4b0fc8328a692bd284016f806ed0eaca390ad8",
+                "sha256:611bb273cd68f3b993fabdc4064fc858c5b47a973cb5aa7999ec1ba405c87cd7"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==3.0.1"
+            "version": "==3.0.3"
         },
         "jschon": {
             "hashes": [
-                "sha256:1dcb817a12145eaee703a77aa55a62c26a735195bf36dd9afa3291fc9383fa5f",
-                "sha256:c190e1fffe3e4c5687a1ba68f53a7dbcc9be92ba6d1d46a8d85aa6ddcd99a4fe"
+                "sha256:44444038c34684bdfa66ce4ece6ac4b3b49f9fcd6a43d952557f445c89790147",
+                "sha256:8307ef60fefe3e586d45bc3683a9edf5465d07c79df1ee8b9e2fcfcd2b86a7ad"
             ],
             "index": "pypi",
-            "version": "==0.6.0"
+            "version": "==0.7.3"
         },
         "jsonschema": {
             "hashes": [
-                "sha256:4e5b3cf8216f577bee9ce139cbe72eca3ea4f292ec60928ff24758ce626cd163",
-                "sha256:c8a85b28d377cc7737e46e2d9f2b4f44ee3c0e1deac6bf46ddefc7187d30797a"
+                "sha256:0070ca8dd5bf47941d1e9d8bc115a3654b1138cfb8aff44f3e3527276107314f",
+                "sha256:91ffbad994d766041c6003d5f8f475cceb890c30084bd0e64847ccb1c10e48bb"
             ],
             "index": "pypi",
-            "version": "==3.2.0"
+            "version": "==4.3.1"
         },
         "markupsafe": {
             "hashes": [
                 "sha256:01a9b8ea66f1658938f65b93a85ebe8bc016e6769611be228d797c9d998dd298",
                 "sha256:023cb26ec21ece8dc3907c0e8320058b2e0cb3c55cf9564da612bc325bed5e64",
                 "sha256:0446679737af14f45767963a1a9ef7620189912317d095f2d9ffa183a4d25d2b",
+                "sha256:04635854b943835a6ea959e948d19dcd311762c5c0c6e1f0e16ee57022669194",
                 "sha256:0717a7390a68be14b8c793ba258e075c6f4ca819f15edfc2a3a027c823718567",
                 "sha256:0955295dd5eec6cb6cc2fe1698f4c6d84af2e92de33fbcac4111913cd100a6ff",
+                "sha256:0d4b31cc67ab36e3392bbf3862cfbadac3db12bdd8b02a2731f509ed5b829724",
                 "sha256:10f82115e21dc0dfec9ab5c0223652f7197feb168c940f3ef61563fc2d6beb74",
+                "sha256:168cd0a3642de83558a5153c8bd34f175a9a6e7f6dc6384b9655d2697312a646",
                 "sha256:1d609f577dc6e1aa17d746f8bd3c31aa4d258f4070d61b2aa5c4166c1539de35",
+                "sha256:1f2ade76b9903f39aa442b4aadd2177decb66525062db244b35d71d0ee8599b6",
+                "sha256:20dca64a3ef2d6e4d5d615a3fd418ad3bde77a47ec8a23d984a12b5b4c74491a",
+                "sha256:2a7d351cbd8cfeb19ca00de495e224dea7e7d919659c2841bbb7f420ad03e2d6",
+                "sha256:2d7d807855b419fc2ed3e631034685db6079889a1f01d5d9dac950f764da3dad",
                 "sha256:2ef54abee730b502252bcdf31b10dacb0a416229b72c18b19e24a4509f273d26",
+                "sha256:36bc903cbb393720fad60fc28c10de6acf10dc6cc883f3e24ee4012371399a38",
+                "sha256:37205cac2a79194e3750b0af2a5720d95f786a55ce7df90c3af697bfa100eaac",
                 "sha256:3c112550557578c26af18a1ccc9e090bfe03832ae994343cfdacd287db6a6ae7",
+                "sha256:3dd007d54ee88b46be476e293f48c85048603f5f516008bee124ddd891398ed6",
+                "sha256:4296f2b1ce8c86a6aea78613c34bb1a672ea0e3de9c6ba08a960efe0b0a09047",
                 "sha256:47ab1e7b91c098ab893b828deafa1203de86d0bc6ab587b160f78fe6c4011f75",
                 "sha256:49e3ceeabbfb9d66c3aef5af3a60cc43b85c33df25ce03d0031a608b0a8b2e3f",
+                "sha256:4dc8f9fb58f7364b63fd9f85013b780ef83c11857ae79f2feda41e270468dd9b",
                 "sha256:4efca8f86c54b22348a5467704e3fec767b2db12fc39c6d963168ab1d3fc9135",
                 "sha256:53edb4da6925ad13c07b6d26c2a852bd81e364f95301c66e930ab2aef5b5ddd8",
+                "sha256:5855f8438a7d1d458206a2466bf82b0f104a3724bf96a1c781ab731e4201731a",
                 "sha256:594c67807fb16238b30c44bdf74f36c02cdf22d1c8cda91ef8a0ed8dabf5620a",
+                "sha256:5b6d930f030f8ed98e3e6c98ffa0652bdb82601e7a016ec2ab5d7ff23baa78d1",
+                "sha256:5bb28c636d87e840583ee3adeb78172efc47c8b26127267f54a9c0ec251d41a9",
+                "sha256:60bf42e36abfaf9aff1f50f52644b336d4f0a3fd6d8a60ca0d054ac9f713a864",
                 "sha256:611d1ad9a4288cf3e3c16014564df047fe08410e628f89805e475368bd304914",
+                "sha256:6300b8454aa6930a24b9618fbb54b5a68135092bc666f7b06901f897fa5c2fee",
+                "sha256:63f3268ba69ace99cab4e3e3b5840b03340efed0948ab8f78d2fd87ee5442a4f",
                 "sha256:6557b31b5e2c9ddf0de32a691f2312a32f77cd7681d8af66c2692efdbef84c18",
                 "sha256:693ce3f9e70a6cf7d2fb9e6c9d8b204b6b39897a2c4a1aa65728d5ac97dcc1d8",
                 "sha256:6a7fae0dd14cf60ad5ff42baa2e95727c3d81ded453457771d02b7d2b3f9c0c2",
                 "sha256:6c4ca60fa24e85fe25b912b01e62cb969d69a23a5d5867682dd3e80b5b02581d",
+                "sha256:6fcf051089389abe060c9cd7caa212c707e58153afa2c649f00346ce6d260f1b",
                 "sha256:7d91275b0245b1da4d4cfa07e0faedd5b0812efc15b702576d103293e252af1b",
+                "sha256:89c687013cb1cd489a0f0ac24febe8c7a666e6e221b783e53ac50ebf68e45d86",
+                "sha256:8d206346619592c6200148b01a2142798c989edcb9c896f9ac9722a99d4e77e6",
                 "sha256:905fec760bd2fa1388bb5b489ee8ee5f7291d692638ea5f67982d968366bef9f",
                 "sha256:97383d78eb34da7e1fa37dd273c20ad4320929af65d156e35a5e2d89566d9dfb",
                 "sha256:984d76483eb32f1bcb536dc27e4ad56bba4baa70be32fa87152832cdd9db0833",
+                "sha256:99df47edb6bda1249d3e80fdabb1dab8c08ef3975f69aed437cb69d0a5de1e28",
+                "sha256:9f02365d4e99430a12647f09b6cc8bab61a6564363f313126f775eb4f6ef798e",
                 "sha256:a30e67a65b53ea0a5e62fe23682cfe22712e01f453b95233b25502f7c61cb415",
                 "sha256:ab3ef638ace319fa26553db0624c4699e31a28bb2a835c5faca8f8acf6a5a902",
+                "sha256:aca6377c0cb8a8253e493c6b451565ac77e98c2951c45f913e0b52facdcff83f",
+                "sha256:add36cb2dbb8b736611303cd3bfcee00afd96471b09cda130da3581cbdc56a6d",
                 "sha256:b2f4bf27480f5e5e8ce285a8c8fd176c0b03e93dcc6646477d4630e83440c6a9",
                 "sha256:b7f2d075102dc8c794cbde1947378051c4e5180d52d276987b8d28a3bd58c17d",
+                "sha256:baa1a4e8f868845af802979fcdbf0bb11f94f1cb7ced4c4b8a351bb60d108145",
                 "sha256:be98f628055368795d818ebf93da628541e10b75b41c559fdf36d104c5787066",
+                "sha256:bf5d821ffabf0ef3533c39c518f3357b171a1651c1ff6827325e4489b0e46c3c",
+                "sha256:c47adbc92fc1bb2b3274c4b3a43ae0e4573d9fbff4f54cd484555edbf030baf1",
+                "sha256:cdfba22ea2f0029c9261a4bd07e830a8da012291fbe44dc794e488b6c9bb353a",
+                "sha256:d6c7ebd4e944c85e2c3421e612a7057a2f48d478d79e61800d81468a8d842207",
                 "sha256:d7f9850398e85aba693bb640262d3611788b1f29a79f0c93c565694658f4071f",
+                "sha256:d8446c54dc28c01e5a2dbac5a25f071f6653e6e40f3a8818e8b45d790fe6ef53",
+                "sha256:deb993cacb280823246a026e3b2d81c493c53de6acfd5e6bfe31ab3402bb37dd",
+                "sha256:e0f138900af21926a02425cf736db95be9f4af72ba1bb21453432a07f6082134",
+                "sha256:e9936f0b261d4df76ad22f8fee3ae83b60d7c3e871292cd42f40b81b70afae85",
+                "sha256:f0567c4dc99f264f49fe27da5f735f414c4e7e7dd850cfd8e69f0862d7c74ea9",
                 "sha256:f5653a225f31e113b152e56f154ccbe59eeb1c7487b39b9d9f9cdb58e6c79dc5",
                 "sha256:f826e31d18b516f653fe296d967d700fddad5901ae07c622bb3705955e1faa94",
                 "sha256:f8ba0e8349a38d3001fae7eadded3f6606f0da5d748ee53cc1dab1d6527b9509",
@@ -144,27 +187,27 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:7dc96269f53a4ccec5c0670940a4281106dd0bb343f47b7471f779df49c2fbe7",
-                "sha256:c86254f9220d55e31cc94d69bade760f0847da8000def4dfe1c6b872fd14ff14"
+                "sha256:dd47c42927d89ab911e606518907cc2d3a1f38bbd026385970643f9c5b8ecfeb",
+                "sha256:ef103e05f519cdc783ae24ea4e2e0f508a9c99b2d4969652eed6a2e1ea5bd522"
             ],
             "markers": "python_version >= '3.6'",
-            "version": "==21.0"
+            "version": "==21.3"
         },
         "pygments": {
             "hashes": [
-                "sha256:a18f47b506a429f6f4b9df81bb02beab9ca21d0a5fee38ed15aef65f0545519f",
-                "sha256:d66e804411278594d764fc69ec36ec13d9ae9147193a1740cd34d272ca383b8e"
+                "sha256:b8e67fe6af78f492b3c4b3e2970c0624cbf08beb1e493b2c99b9fa1b67a20380",
+                "sha256:f398865f7eb6874156579fdf36bc840a03cab64d1cde9e93d68f46a425ec52c6"
             ],
             "markers": "python_version >= '3.5'",
-            "version": "==2.9.0"
+            "version": "==2.10.0"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
-                "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
+                "sha256:04ff808a5b90911829c55c4e26f75fa5ca8a2f5f36aa3a51f68e27033341d3e4",
+                "sha256:d9bdec0013ef1eb5a84ab39a3b3868911598afa494f5faa038647101504e2b81"
             ],
-            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2'",
-            "version": "==2.4.7"
+            "markers": "python_version >= '3.6'",
+            "version": "==3.0.6"
         },
         "pyrsistent": {
             "hashes": [
@@ -195,10 +238,10 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:83a4a90894bf38e243cf052c8b58f381bfe9a7a483f6a9cab140bc7f702ac4da",
-                "sha256:eb10ce3e7736052ed3623d49975ce333bcd712c7bb19a58b9e2089d4057d0798"
+                "sha256:3672058bc3453457b622aab7a1c3bfd5ab0bdae451512f6cf25f64ed37f5b87c",
+                "sha256:acad2d8b20a1af07d4e4c9d2e9285c5ed9104354062f275f3fcd88dcef4f1326"
             ],
-            "version": "==2021.1"
+            "version": "==2021.3"
         },
         "requests": {
             "hashes": [
@@ -225,25 +268,26 @@
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:b51b447bea85f9968c13b650126a888aabd4cb4463fca868ec596826325dedc2",
-                "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"
+                "sha256:09b16deb8547d3412ad7b590689584cd0fe25ec8db3be37788be3810cbf19cb1",
+                "sha256:c8e1716e83cc398ae16824e5572ae04e0d9fc2c6b985fb0f900f5f0c96ecba1a"
             ],
-            "version": "==2.1.0"
+            "version": "==2.2.0"
         },
         "sphinx": {
             "hashes": [
-                "sha256:9f3e17c64b34afc653d7c5ec95766e03043cc6d80b0de224f59b6b6e19d37c3c",
-                "sha256:c7658aab75c920288a8cf6f09f244c6cfdae30d82d803ac1634d9f223a80ca08"
+                "sha256:5973adbb19a5de30e15ab394ec8bc05700317fa83f122c349dd01804d983720f",
+                "sha256:e096b1b369dbb0fcb95a31ba8c9e1ae98c588e601f08eada032248e1696de4b1"
             ],
             "index": "pypi",
-            "version": "==1.8.5"
+            "version": "==1.8.6"
         },
         "sphinx-bootstrap-theme": {
             "hashes": [
-                "sha256:571e43ccb76d4c6c06576aa24a826b6ebc7adac45a5b54985200128806279d08"
+                "sha256:038ee7e89478e064b5dd7e614de6f3f4cec81d9f9efbebb06e105693d6a50924",
+                "sha256:8b648023a0587f1695460670554ca3fb493e344313189b74a87b0ba27168ca47"
             ],
             "index": "pypi",
-            "version": "==0.7.1"
+            "version": "==0.8.0"
         },
         "sphinxcontrib-serializinghtml": {
             "hashes": [
@@ -263,11 +307,19 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4",
-                "sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f"
+                "sha256:4987c65554f7a2dbf30c18fd48778ef124af6fab771a377103da0585e2336ece",
+                "sha256:c4fdf4019605b6e5423637e01bc9fe4daef873709a7973e195ceba0a62bbc844"
             ],
             "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
-            "version": "==1.26.6"
+            "version": "==1.26.7"
+        },
+        "zipp": {
+            "hashes": [
+                "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832",
+                "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"
+            ],
+            "markers": "python_version < '3.10'",
+            "version": "==3.6.0"
         }
     },
     "develop": {}
diff --git a/source/sphinxext/jsonschemaext.py b/source/sphinxext/jsonschemaext.py
index 1c5f400f..4ac64d37 100644
--- a/source/sphinxext/jsonschemaext.py
+++ b/source/sphinxext/jsonschemaext.py
@@ -6,7 +6,7 @@
 from sphinx.util.nodes import set_source_info
 
 import jsonschema
-from jschon import Catalogue, JSON, JSONSchema, URI
+from jschon import create_catalog, JSON, JSONSchema, URI
 
 
 legacy = {
@@ -31,14 +31,13 @@ def validate(schema, part, standard):
 
         return (is_valid, message)
     else:
-        catalogue = Catalogue('2019-09', '2020-12')
-        Catalogue._default_catalogue = catalogue
+        catalogue = create_catalog('2019-09', '2020-12')
 
         compiled_schema = JSONSchema(schema.json, metaschema_uri=URI(standard))
         if not compiled_schema.validate().valid:
             raise ValueError("Schema is invalid:\n{0}\n\n{1}".format(
                 "INVALID SCHEMA", schema.content))
-        elif part.json is (1+1j):
+        elif part.json == (1+1j):
             return (False, 'INVALID JSON')
         else:
             jsonValue = JSON.loads(part.content)