diff --git a/packages/schema/package.json b/packages/schema/package.json
index 0bcafffb..670e36c9 100644
--- a/packages/schema/package.json
+++ b/packages/schema/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@apimatic/schema",
   "author": "APIMatic Ltd.",
-  "version": "0.7.6",
+  "version": "0.7.7",
   "license": "MIT",
   "sideEffects": false,
   "main": "lib/index.js",
diff --git a/packages/schema/src/types/numberEnum.ts b/packages/schema/src/types/numberEnum.ts
index bb9352a3..83e55653 100644
--- a/packages/schema/src/types/numberEnum.ts
+++ b/packages/schema/src/types/numberEnum.ts
@@ -1,27 +1,36 @@
 import { Schema } from '../schema';
 import {
+  isNumericString,
   coerceNumericStringToNumber,
   createSymmetricSchema,
-  isNumericString,
   toValidator,
 } from '../utils';
 
 function createEnumChecker<T extends string, TEnumValue extends number>(
-  enumVariable: { [key in T]: TEnumValue }
+  enumVariable: { [key in T]: TEnumValue },
+  allowForUnknownProps: boolean = false
 ) {
   const enumValues = Object.values(enumVariable);
-  return (value: unknown): value is TEnumValue =>
-    isNumericString(value) &&
-    enumValues.includes(coerceNumericStringToNumber(value));
+
+  if (allowForUnknownProps) {
+    return (value: unknown): value is TEnumValue => isNumericString(value);
+  } else {
+    return (value: unknown): value is TEnumValue =>
+      isNumericString(value) &&
+      enumValues.includes(coerceNumericStringToNumber(value));
+  }
 }
 
 /**
  * Create a schema for a number enumeration.
  */
 export function numberEnum<T extends string, TEnumValue extends number>(
-  enumVariable: { [key in T]: TEnumValue }
+  enumVariable: { [key in T]: TEnumValue },
+  allowForUnknownProps: boolean = false
 ): Schema<TEnumValue, TEnumValue> {
-  const validate = toValidator(createEnumChecker(enumVariable));
+  const validate = toValidator(
+    createEnumChecker(enumVariable, allowForUnknownProps)
+  );
 
   return createSymmetricSchema({
     type: `Enum<${Object.values(enumVariable)
diff --git a/packages/schema/src/types/stringEnum.ts b/packages/schema/src/types/stringEnum.ts
index 430bddf7..0b935cc3 100644
--- a/packages/schema/src/types/stringEnum.ts
+++ b/packages/schema/src/types/stringEnum.ts
@@ -7,20 +7,29 @@ import {
 } from '../utils';
 
 function createEnumChecker<T extends string, TEnumValue extends string>(
-  enumVariable: { [key in T]: TEnumValue }
+  enumVariable: { [key in T]: TEnumValue },
+  allowForUnknownProps: boolean = false
 ) {
   const enumValues = Object.values(enumVariable);
-  return (value: unknown): value is TEnumValue =>
-    typeof value === 'string' && enumValues.includes(value);
+
+  if (allowForUnknownProps) {
+    return (value: unknown): value is TEnumValue => typeof value === 'string';
+  } else {
+    return (value: unknown): value is TEnumValue =>
+      typeof value === 'string' && enumValues.includes(value as TEnumValue);
+  }
 }
 
 /**
  * Create a schema for a string enumeration.
  */
 export function stringEnum<T extends string, TEnumValue extends string>(
-  enumVariable: { [key in T]: TEnumValue }
+  enumVariable: { [key in T]: TEnumValue },
+  allowForUnknownProps: boolean = false
 ): Schema<TEnumValue, TEnumValue> {
-  const validate = toValidator(createEnumChecker(enumVariable));
+  const validate = toValidator(
+    createEnumChecker(enumVariable, allowForUnknownProps)
+  );
 
   return createSymmetricSchema({
     type: `Enum<${Object.values(enumVariable).map(literalToString).join(',')}>`,
diff --git a/packages/schema/test/types/numberSchema.test.ts b/packages/schema/test/types/numberSchema.test.ts
index f99f86a8..99afc40f 100644
--- a/packages/schema/test/types/numberSchema.test.ts
+++ b/packages/schema/test/types/numberSchema.test.ts
@@ -8,6 +8,26 @@ describe('Number Enum', () => {
     Diamonds,
   }
   describe('Mapping', () => {
+    it('should map unknown numeric value in enum', () => {
+      const input = 5;
+      const output = validateAndMap(
+        input as any,
+        numberEnum(SampleNumberEnum, true)
+      );
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(5);
+    });
+
+    it('should map unknown numeric string value in enum', () => {
+      const input = '5';
+      const output = validateAndMap(
+        input as any,
+        numberEnum(SampleNumberEnum, true)
+      );
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe(5);
+    });
+
     it('should map enum', () => {
       const input = 0;
       const output = validateAndMap(input as any, numberEnum(SampleNumberEnum));
diff --git a/packages/schema/test/types/stringEnum.test.ts b/packages/schema/test/types/stringEnum.test.ts
index 2f8484a2..258096f5 100644
--- a/packages/schema/test/types/stringEnum.test.ts
+++ b/packages/schema/test/types/stringEnum.test.ts
@@ -8,6 +8,16 @@ describe('String Enum', () => {
     Diamonds = '_diamonds',
   }
   describe('Mapping', () => {
+    it('should map unknown string value in enum', () => {
+      const input = 'unknown';
+      const output = validateAndMap(
+        input as any,
+        stringEnum(SampleStringEnum, true)
+      );
+      expect(output.errors).toBeFalsy();
+      expect((output as any).result).toBe('unknown');
+    });
+
     it('should map enum', () => {
       const input = '_hearts';
       const output = validateAndMap(input as any, stringEnum(SampleStringEnum));