diff --git a/src/index.ts b/src/index.ts
index bd4dbfc..9415092 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -32,7 +32,8 @@ export class Obfuscator {
 	public blur(rawData: TTargetFieldType) {
 		const rawDataType = typeof rawData;
 
-		if (!rawData) throw new Error('Blur data type null or undefined is not supported');
+		if (rawData === null || rawData === undefined)
+			throw new Error('Blur data type null or undefined is not supported');
 
 		switch (rawDataType) {
 			case 'object':
diff --git a/test/module.spec.ts b/test/module.spec.ts
index 2aeb6a8..1966810 100644
--- a/test/module.spec.ts
+++ b/test/module.spec.ts
@@ -53,9 +53,15 @@ describe('Testing Obfuscator module and structures', () => {
 		expect(obf.blur('222.222.222-54')).not.toEqual('222.222.222-54');
 	});
 
+	it('Obfuscator null should throw error', () => {
+		const obf = new Obfuscator();
+		expect(obf.blur);
+		expect(obf.blur.bind((null as unknown) as TTargetFieldType)).toThrow(/Blur data type null or undefined is not supported/);
+	});
+
 	it('Obfuscator with different type of input', () => {
 		const obf = new Obfuscator();
 		expect(obf.blur);
-		expect(obf.blur.bind((true as unknown) as TTargetFieldType)).toThrow(/Data type not supported/);
+		expect(obf.blur.bind((true as unknown) as TTargetFieldType)).toThrow(/Blur data type null or undefined is not supported/);
 	});
 });
diff --git a/test/object.spec.ts b/test/object.spec.ts
index e8275d4..9fed8d8 100644
--- a/test/object.spec.ts
+++ b/test/object.spec.ts
@@ -2,7 +2,7 @@ import { Obfuscator } from '../dist/cjs';
 
 const replacerText = `NOT_VISIBLE`;
 
-function generateText(defaultDirtyStringData: string | object) {
+function generateText(defaultDirtyStringData: any) {
 	const obf = new Obfuscator({
 		replacerText: replacerText,
 	});
@@ -45,4 +45,12 @@ describe('Blur Value successfully from object', () => {
 		});
 		expect(obf.blur({ obfuscator: 'teste' })).toEqual({ obfuscator: replacerText });
 	});
+
+	it('Validate null and undefined object value', () => {
+		const obf = new Obfuscator({
+			replacerText: replacerText,
+			additionalObjectKeys: ['obfuscator'],
+		});
+		expect(obf.blur({ obfuscator: 'teste', add: null, test: undefined })).toEqual({ obfuscator: replacerText, add: null, test: null });
+	});
 });