diff --git a/changelog.md b/changelog.md
index a4c2f05..cc5be7c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 2024-08-24 - 1.2.1 - fix(Assertion)
+Refactor methods for setting failure and success messages
+
+- Renamed 'withFailMessage' to 'setFailMessage' for better readability and consistency.
+- Renamed 'withSuccessMessage' to 'setSuccessMessage' to align with the naming convention.
+
 ## 2024-08-24 - 1.2.0 - feat(assertions)
 Add custom fail and success messages for assertions
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 58eaff2..ee02f37 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartexpect',
-  version: '1.2.0',
+  version: '1.2.1',
   description: 'A testing library to manage expectations in code, offering both synchronous and asynchronous assertion methods.'
 }
diff --git a/ts/smartexpect.classes.assertion.ts b/ts/smartexpect.classes.assertion.ts
index 9a5a3d4..3210183 100644
--- a/ts/smartexpect.classes.assertion.ts
+++ b/ts/smartexpect.classes.assertion.ts
@@ -32,13 +32,13 @@ export class Assertion {
   }
 
   private failMessage: string;
-  public withFailMessage(failMessageArg: string) {
+  public setFailMessage(failMessageArg: string) {
     this.failMessage = failMessageArg;
     return this;
   }
 
   private successMessage: string;
-  public withSuccessMessage(successMessageArg: string) {
+  public setSuccessMessage(successMessageArg: string) {
     this.successMessage = successMessageArg;
     return this;
   }