diff --git a/src/replace.spec.ts b/src/replace.spec.ts
index f8cf811..333ebe4 100644
--- a/src/replace.spec.ts
+++ b/src/replace.spec.ts
@@ -41,6 +41,19 @@ describe('replace', () => {
       expect(result).toEqual(expected);
     });
 
+    it('should replace curly brace placeholders with values from mockParameters object even if one is null', () => {
+      const mockParameters = {
+        param1: 'value1',
+        param2: 123, // non-string value
+        param3: null, // non-string value
+        param4: 'value4/with/slashes' // should be kebab-cased
+      } as any;
+      const mockFileStringWithCurlyBrace = 'This is a {param1} and {param2} and {param3} and {param4}';
+      const expectedResult = 'This is a value-1 and 123 and null and value4/with/slashes';
+      const result = replaceCurlyBrace(mockParameters, mockFileStringWithCurlyBrace, true);
+      expect(result).toEqual(expectedResult);
+    });
+
     describe('parseEJSCode', () => {
       it('should replace tag parameters', () => {
         const mockParameters = {
diff --git a/src/replace.ts b/src/replace.ts
index a9d64f1..6ff958f 100644
--- a/src/replace.ts
+++ b/src/replace.ts
@@ -21,12 +21,14 @@ export const parseEJSCode = (
   return ejs.render(toReplace, parameters)
 }
 
-export const replaceCurlyBrace = (mockParameters: object, mockFileStringWithCurlyBrace: string, useKebabCase?: boolean): string => {
+export const replaceCurlyBrace = (mockParameters: Record<string, string>, mockFileStringWithCurlyBrace: string, useKebabCase?: boolean): string => {
   let result = mockFileStringWithCurlyBrace;
   for(const key in mockParameters) {
     // only use kebab case if non file path
-    const valueToReplaceWith = useKebabCase && mockParameters[key].split('/').length < 2 ? kebabCase(mockParameters[key]) : mockParameters[key];
+    const value = mockParameters[key];
+    const isString = typeof value === 'string';
+    const valueToReplaceWith = useKebabCase && isString && value.split('/').length < 2 ? kebabCase(value) : value;
     result = result.replaceAll('{' + key + '}', valueToReplaceWith);
   }
   return result;
-}
\ No newline at end of file
+}