diff --git a/connexion/json_schema.py b/connexion/json_schema.py
index f2d67a39b..47b6ab562 100644
--- a/connexion/json_schema.py
+++ b/connexion/json_schema.py
@@ -128,6 +128,29 @@ def nullable_validation_fn(validator, to_validate, instance, schema):
     return nullable_validation_fn
 
 
+def validate_required(validator, required, instance, schema):
+    if not validator.is_type(instance, "object"):
+        return
+
+    for prop in required:
+        if prop not in instance:
+            properties = schema.get('properties')
+            if properties is not None:
+                subschema = properties.get(prop)
+                if subschema is not None:
+                    if 'readOnly' in validator.VALIDATORS and subschema.get('readOnly'):
+                        continue
+                    if 'writeOnly' in validator.VALIDATORS and subschema.get('writeOnly'):
+                        continue
+                    if 'x-writeOnly' in validator.VALIDATORS and subschema.get('x-writeOnly') is True:
+                        continue
+            yield ValidationError("%r is a required property" % prop)
+
+
+def validate_readOnly(validator, wo, instance, schema):
+    yield ValidationError("Property is read-only")
+
+
 def validate_writeOnly(validator, wo, instance, schema):
     yield ValidationError("Property is write-only")
 
@@ -140,6 +163,8 @@ def validate_writeOnly(validator, wo, instance, schema):
     {
         "type": NullableTypeValidator,
         "enum": NullableEnumValidator,
+        "readOnly": validate_readOnly,
+        "required": validate_required,
     },
 )
 
@@ -150,5 +175,6 @@ def validate_writeOnly(validator, wo, instance, schema):
         "enum": NullableEnumValidator,
         "writeOnly": validate_writeOnly,
         "x-writeOnly": validate_writeOnly,
+        "required": validate_required,
     },
 )