diff --git a/changelogs/internal/newsfragments/1556.clarification b/changelogs/internal/newsfragments/1556.clarification
new file mode 100644
index 00000000..05c5897e
--- /dev/null
+++ b/changelogs/internal/newsfragments/1556.clarification
@@ -0,0 +1 @@
+Bump jsonschema to validate JSON Schemas against Draft 2020-12.
diff --git a/scripts/check-event-schema-examples.py b/scripts/check-event-schema-examples.py
index e5261c87..c6191321 100755
--- a/scripts/check-event-schema-examples.py
+++ b/scripts/check-event-schema-examples.py
@@ -88,7 +88,7 @@ def check_example_file(examplepath, schemapath):
 
     fileurl = "file://" + os.path.abspath(schemapath)
     schema["id"] = fileurl
-    resolver = jsonschema.RefResolver(schemapath, schema, handlers={"file": load_file})
+    resolver = jsonschema.RefResolver(fileurl, schema, handlers={"file": load_file})
 
     print ("Checking schema for: %r %r" % (examplepath, schemapath))
     try:
diff --git a/scripts/requirements.txt b/scripts/requirements.txt
index 9d9f1167..a3ff4f0b 100644
--- a/scripts/requirements.txt
+++ b/scripts/requirements.txt
@@ -1,9 +1,8 @@
 # no doubt older versions would be fine for many of these but these were
 # current at the time of writing
 
-# jsonschema 3.0.0 objects to the $refs in our schema file. TODO: figure out
-# why.
-jsonschema >= 2.6.0, < 3.0.0
+# we need at least version 4.0.0 for support of JSON Schema Draft 2020-12.
+jsonschema >= 4.0.0
 
 PyYAML >= 3.12
 requests >= 2.18.4