diff --git a/packages/quicktype-core/src/language/Java/JavaJacksonRenderer.ts b/packages/quicktype-core/src/language/Java/JavaJacksonRenderer.ts
index f6af97f157..5f159b5fb8 100644
--- a/packages/quicktype-core/src/language/Java/JavaJacksonRenderer.ts
+++ b/packages/quicktype-core/src/language/Java/JavaJacksonRenderer.ts
@@ -32,6 +32,10 @@ export class JacksonRenderer extends JavaRenderer {
         "JsonParser",
         "JsonProcessingException",
         "ObjectMapper",
+        "ObjectReader",
+        "ObjectWriter",
+        "DeserializationFeature",
+        "SerializationFeature",
         "DeserializationContext",
         "SerializerProvider",
         "None",
diff --git a/packages/quicktype-core/src/language/Kotlin/KotlinJacksonRenderer.ts b/packages/quicktype-core/src/language/Kotlin/KotlinJacksonRenderer.ts
index dfcf5d01d1..408525bea9 100644
--- a/packages/quicktype-core/src/language/Kotlin/KotlinJacksonRenderer.ts
+++ b/packages/quicktype-core/src/language/Kotlin/KotlinJacksonRenderer.ts
@@ -32,8 +32,18 @@ export class KotlinJacksonRenderer extends KotlinRenderer {
             "JsonGenerator",
             "JsonNode",
             "JsonParser",
+            "ArrayNode",
+            "BooleanNode",
+            "DeserializationFeature",
+            "DoubleNode",
+            "IntNode",
+            "LongNode",
+            "NullNode",
+            "ObjectNode",
+            "TextNode",
             "ObjectMapper",
             "SerializerProvider",
+            "SerializationFeature",
             "SimpleModule",
             "StdDeserializer",
             "StdSerializer",
diff --git a/test/inputs/json/priority/keywords.json b/test/inputs/json/priority/keywords.json
index fce8e35bba..ea1d081135 100644
--- a/test/inputs/json/priority/keywords.json
+++ b/test/inputs/json/priority/keywords.json
@@ -11,6 +11,7 @@
       "and_eq": { "and_eq": 123 },
       "any": { "any": 123 },
       "Any": { "Any": 123 },
+      "ArrayNode": { "ArrayNode": 123 },
       "array": { "array": 123 },
       "as": { "as": 123 },
       "asm": { "asm": 123 },
@@ -30,6 +31,7 @@
       "BOOL": { "BOOL": 123 },
       "bool": { "bool": 123 },
       "boolean": { "boolean": 123 },
+      "BooleanNode": { "BooleanNode": 123 },
       "break": { "break": 123 },
       "bycopy": { "bycopy": 123 },
       "byref": { "byref": 123 },
@@ -62,11 +64,11 @@
       "convenience": { "convenience": 123 },
       "convert": { "convert": 123 },
       "converter": { "converter": 123 },
-      "CultureInfo": { "CultureInfo": 123 },
-      "date": { "date": 123 },
       "dummy": 123
     },
   "obj2": {
+      "CultureInfo": { "CultureInfo": 123 },
+      "date": { "date": 123 },
       "date_parse_handling": { "date_parse_handling": 123 },
       "DateFormatter": { "DateFormatter": 123 },
       "DateOnly": { "DateOnly": 123 },
@@ -76,6 +78,7 @@
       "debugger": { "debugger": 123 },
       "decimal": { "decimal": 123 },
       "declare": { "declare": 123 },
+      "DeserializationFeature": { "DeserializationFeature": 123 },
       "decltype": { "decltype": 123 },
       "decode_string": { "decode_string": 123 },
       "Decoder": { "Decoder": 123 },
@@ -92,6 +95,7 @@
       "didSet": { "didSet": 123 },
       "do": { "do": 123 },
       "double": { "double": 123 },
+      "DoubleNode": { "DoubleNode": 123 },
       "dynamic": { "dynamic": 123 },
       "dynamic_cast": { "dynamic_cast": 123 },
       "elif": { "elif": 123 },
@@ -127,13 +131,13 @@
       "from_dict": { "from_dict": 123 },
       "from_json": { "from_json": 123 },
       "func": { "func": 123 },
+      "dummy": 123
+    },
+  "obj3": {
       "function": { "function": 123 },
       "get": { "get": 123 },
       "global": { "global": 123 },
       "go": { "go": 123 },
-      "dummy": 123
-    },
-  "obj3": {
       "goto": { "goto": 123 },
       "guard": { "guard": 123 },
       "Hashable": { "Hashable": 123 },
@@ -154,6 +158,7 @@
       "inout": { "inout": 123 },
       "instanceof": { "instanceof": 123 },
       "int": { "int": 123 },
+      "IntNode": { "IntNode": 123 },
       "interface": { "interface": 123 },
       "internal": { "internal": 123 },
       "IsoDateTimeOffsetConverter": { "IsoDateTimeOffsetConverter": 123 },
@@ -183,6 +188,7 @@
       "left": { "left": 123 },
       "let": { "let": 123 },
       "list": { "list": 123 },
+      "LongNode": { "LongNode": 123 },
       "Locale": { "Locale": 123 },
       "lock": { "lock": 123 },
       "long": { "long": 123 },
@@ -192,15 +198,16 @@
       "module": { "module": 123 },
       "mutable": { "mutable": 123 },
       "mutating": { "mutating": 123 },
+      "dummy": 123
+    },
+  "obj4": {
       "namespace": { "namespace": 123 },
       "native": { "native": 123 },
       "new": { "new": 123 },
       "newtonsoft": { "newtonsoft": 123 },
       "nil": { "nil": 123 },
+      "NullNode": { "NullNode": 123 },
       "NO": { "NO": 123 },
-      "dummy": 123
-    },
-  "obj4": {
       "noexcept": { "noexcept": 123 },
       "nonatomic": { "nonatomic": 123 },
       "none": { "none": 123 },
@@ -218,7 +225,10 @@
       "nullptr": { "nullptr": 123 },
       "number": { "number": 123 },
       "object": { "object": 123 },
+      "ObjectNode": { "ObjectNode": 123 },
       "ObjectMapper": { "ObjectMapper": 123 },
+      "ObjectReader": { "ObjectReader": 123 },
+      "ObjectWriter": { "ObjectWriter": 123 },
       "of": { "of": 123 },
       "oneway": { "oneway": 123 },
       "open": { "open": 123 },
@@ -255,6 +265,9 @@
       "require": { "require": 123 },
       "required": { "required": 123 },
       "requires": { "requires": 123 },
+      "dummy": 123
+    },
+  "obj5": {
       "restrict": { "restrict": 123 },
       "retain": { "retain": 123 },
       "rethrows": { "rethrows": 123 },
@@ -265,9 +278,6 @@
       "sbyte": { "sbyte": 123 },
       "sealed": { "sealed": 123 },
       "SEL": { "SEL": 123 },
-      "dummy": 123
-    },
-  "obj5": {
       "select": { "select": 123 },
       "Self": { "Self": 123 },
       "Serializable": { "Serializable": 123 },
@@ -278,6 +288,7 @@
       "KSerializer": { "KSerializer": 123 },
       "PrimitiveKind": { "PrimitiveKind": 123 },
       "SerialDescriptor": { "SerialDescriptor": 123 },
+      "SerializationFeature": { "SerializationFeature": 123 },
       "SerializerProvider": { "SerializerProvider": 123 },
       "set": { "set": 123 },
       "short": { "short": 123 },
@@ -303,6 +314,7 @@
       "template": { "template": 123 },
       "then": { "then": 123 },
       "this": { "this": 123 },
+      "TextNode": { "TextNode": 123 },
       "thread_local": { "thread_local": 123 },
       "throw": { "throw": 123 },
       "throws": { "throws": 123 },
@@ -320,6 +332,9 @@
       "Type": { "Type": 123 },
       "type": { "type": 123 },
       "typealias": { "typealias": 123 },
+      "dummy": 123
+    },
+  "obj6": {
       "typedef": { "typedef": 123 },
       "typeid": { "typeid": 123 },
       "typename": { "typename": 123 },
@@ -332,9 +347,6 @@
       "UseSerializers": { "UseSerializers": 123 },
       "unowned": { "unowned": 123 },
       "unsafe": { "unsafe": 123 },
-      "dummy": 123
-    },
-  "obj6": {
       "unsigned": { "unsigned": 123 },
       "ushort": { "ushort": 123 },
       "using": { "using": 123 },
diff --git a/test/inputs/schema/direct-union.1.json b/test/inputs/schema/direct-union.1.json
index 5227ae2d95..2c6a419c72 100644
--- a/test/inputs/schema/direct-union.1.json
+++ b/test/inputs/schema/direct-union.1.json
@@ -1,4 +1,12 @@
 {
+    "arrayNode": {},
+    "booleanNode": {},
+    "doubleNode": {},
+    "intNode": {},
+    "longNode": {},
+    "nullNode": {},
+    "objectNode": {},
+    "textNode": {},
     "stuff": {
         "one": {
             "required": null
@@ -18,4 +26,4 @@
             ]
         }
     }
-}
\ No newline at end of file
+}
diff --git a/test/inputs/schema/direct-union.schema b/test/inputs/schema/direct-union.schema
index 0ecf1a486a..93bdcb4ec5 100644
--- a/test/inputs/schema/direct-union.schema
+++ b/test/inputs/schema/direct-union.schema
@@ -7,12 +7,28 @@
             "additionalProperties": {
                 "$ref": "#/definitions/thing"
             }
-        }
+        },
+        "arrayNode": { "$ref": "#/definitions/ArrayNode" },
+        "booleanNode": { "$ref": "#/definitions/BooleanNode" },
+        "doubleNode": { "$ref": "#/definitions/DoubleNode" },
+        "intNode": { "$ref": "#/definitions/IntNode" },
+        "longNode": { "$ref": "#/definitions/LongNode" },
+        "nullNode": { "$ref": "#/definitions/NullNode" },
+        "objectNode": { "$ref": "#/definitions/ObjectNode" },
+        "textNode": { "$ref": "#/definitions/TextNode" }
     },
     "required": [
         "stuff"
     ],
     "definitions": {
+        "ArrayNode": { "type": "object", "additionalProperties": false },
+        "BooleanNode": { "type": "object", "additionalProperties": false },
+        "DoubleNode": { "type": "object", "additionalProperties": false },
+        "IntNode": { "type": "object", "additionalProperties": false },
+        "LongNode": { "type": "object", "additionalProperties": false },
+        "NullNode": { "type": "object", "additionalProperties": false },
+        "ObjectNode": { "type": "object", "additionalProperties": false },
+        "TextNode": { "type": "object", "additionalProperties": false },
         "thing": {
             "type": "object",
             "additionalProperties": false,
@@ -40,4 +56,4 @@
             ]
         }
     }
-}
\ No newline at end of file
+}
diff --git a/test/inputs/schema/keyword-enum.schema b/test/inputs/schema/keyword-enum.schema
index 5a24b92a0f..c3075f0ff4 100644
--- a/test/inputs/schema/keyword-enum.schema
+++ b/test/inputs/schema/keyword-enum.schema
@@ -15,6 +15,7 @@
         "and_eq",
         "any",
         "Any",
+        "ArrayNode",
         "array",
         "as",
         "asm",
@@ -34,6 +35,7 @@
         "BOOL",
         "bool",
         "boolean",
+        "BooleanNode",
         "break",
         "bycopy",
         "byref",
@@ -77,6 +79,7 @@
         "debugger",
         "decimal",
         "declare",
+        "DeserializationFeature",
         "decltype",
         "decode_string",
         "Decoder",
@@ -93,6 +96,7 @@
         "didSet",
         "do",
         "double",
+        "DoubleNode",
         "dynamic",
         "dynamic_cast",
         "elif",
@@ -152,6 +156,7 @@
         "inout",
         "instanceof",
         "int",
+        "IntNode",
         "interface",
         "internal",
         "IsoDateTimeOffsetConverter",
@@ -181,6 +186,7 @@
         "left",
         "let",
         "list",
+        "LongNode",
         "Locale",
         "lock",
         "long",
@@ -195,6 +201,7 @@
         "new",
         "newtonsoft",
         "nil",
+        "NullNode",
         "NO",
         "noexcept",
         "nonatomic",
@@ -213,7 +220,10 @@
         "nullptr",
         "number",
         "object",
+        "ObjectNode",
         "ObjectMapper",
+        "ObjectReader",
+        "ObjectWriter",
         "of",
         "oneway",
         "open",
@@ -270,6 +280,7 @@
         "KSerializer",
         "PrimitiveKind",
         "SerialDescriptor",
+        "SerializationFeature",
         "SerializerProvider",
         "set",
         "short",
@@ -295,6 +306,7 @@
         "template",
         "then",
         "this",
+        "TextNode",
         "thread_local",
         "throw",
         "throws",
diff --git a/test/inputs/schema/keyword-unions.schema b/test/inputs/schema/keyword-unions.schema
index c4ff0945be..d4f03d4932 100644
--- a/test/inputs/schema/keyword-unions.schema
+++ b/test/inputs/schema/keyword-unions.schema
@@ -78,6 +78,13 @@
             ],
             "title": "union_Any"
         },
+        "ArrayNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "ArrayNode" }
+            ],
+            "title": "union_ArrayNode"
+        },
         "array": {
             "oneOf": [
                 { "type": "number" },
@@ -211,6 +218,13 @@
             ],
             "title": "union_boolean"
         },
+        "BooleanNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "BooleanNode" }
+            ],
+            "title": "union_BooleanNode"
+        },
         "break": {
             "oneOf": [
                 { "type": "number" },
@@ -512,6 +526,13 @@
             ],
             "title": "union_declare"
         },
+        "DeserializationFeature": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "DeserializationFeature" }
+            ],
+            "title": "union_DeserializationFeature"
+        },
         "decltype": {
             "oneOf": [
                 { "type": "number" },
@@ -624,6 +645,13 @@
             ],
             "title": "union_double"
         },
+        "DoubleNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "DoubleNode" }
+            ],
+            "title": "union_DoubleNode"
+        },
         "dynamic": {
             "oneOf": [
                 { "type": "number" },
@@ -1037,6 +1065,13 @@
             ],
             "title": "union_int"
         },
+        "IntNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "IntNode" }
+            ],
+            "title": "union_IntNode"
+        },
         "interface": {
             "oneOf": [
                 { "type": "number" },
@@ -1240,6 +1275,13 @@
             ],
             "title": "union_list"
         },
+        "LongNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "LongNode" }
+            ],
+            "title": "union_LongNode"
+        },
         "Locale": {
             "oneOf": [
                 { "type": "number" },
@@ -1338,6 +1380,13 @@
             ],
             "title": "union_nil"
         },
+        "NullNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "NullNode" }
+            ],
+            "title": "union_NullNode"
+        },
         "NO": {
             "oneOf": [
                 { "type": "number" },
@@ -1464,6 +1513,13 @@
             ],
             "title": "union_object"
         },
+        "ObjectNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "ObjectNode" }
+            ],
+            "title": "union_ObjectNode"
+        },
         "ObjectMapper": {
             "oneOf": [
                 { "type": "number" },
@@ -1471,6 +1527,20 @@
             ],
             "title": "union_ObjectMapper"
         },
+        "ObjectReader": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "ObjectReader" }
+            ],
+            "title": "union_ObjectReader"
+        },
+        "ObjectWriter": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "ObjectWriter" }
+            ],
+            "title": "union_ObjectWriter"
+        },
         "of": {
             "oneOf": [
                 { "type": "number" },
@@ -1863,6 +1933,13 @@
             ],
             "title": "union_SerialDescriptor"
         },
+        "SerializationFeature": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "SerializationFeature" }
+            ],
+            "title": "union_SerializationFeature"
+        },
         "SerializerProvider": {
             "oneOf": [
                 { "type": "number" },
@@ -2038,6 +2115,13 @@
             ],
             "title": "union_this"
         },
+        "TextNode": {
+            "oneOf": [
+                { "type": "number" },
+                { "type": "object", "additionalProperties": false, "title": "TextNode" }
+            ],
+            "title": "union_TextNode"
+        },
         "thread_local": {
             "oneOf": [
                 { "type": "number" },
diff --git a/test/keywords.txt b/test/keywords.txt
index 2859a322a6..e46b59de71 100644
--- a/test/keywords.txt
+++ b/test/keywords.txt
@@ -9,6 +9,7 @@ and
 and_eq
 any
 Any
+ArrayNode
 array
 as
 asm
@@ -28,6 +29,7 @@ bitor
 BOOL
 bool
 boolean
+BooleanNode
 break
 bycopy
 byref
@@ -71,6 +73,7 @@ DateTimeStyles
 debugger
 decimal
 declare
+DeserializationFeature
 decltype
 decode_string
 Decoder
@@ -87,6 +90,7 @@ dictionary
 didSet
 do
 double
+DoubleNode
 dynamic
 dynamic_cast
 elif
@@ -146,6 +150,7 @@ inline
 inout
 instanceof
 int
+IntNode
 interface
 internal
 IsoDateTimeOffsetConverter
@@ -175,6 +180,7 @@ lazy
 left
 let
 list
+LongNode
 Locale
 lock
 long
@@ -189,6 +195,7 @@ native
 new
 newtonsoft
 nil
+NullNode
 NO
 noexcept
 nonatomic
@@ -207,7 +214,10 @@ null
 nullptr
 number
 object
+ObjectNode
 ObjectMapper
+ObjectReader
+ObjectWriter
 of
 oneway
 open
@@ -264,6 +274,7 @@ SerialName
 KSerializer
 PrimitiveKind
 SerialDescriptor
+SerializationFeature
 SerializerProvider
 set
 short
@@ -289,6 +300,7 @@ system
 template
 then
 this
+TextNode
 thread_local
 throw
 throws