diff --git a/packages/circuits/tests/email-verifier.test.ts b/packages/circuits/tests/email-verifier.test.ts
index e70196df..ee2c0cfc 100644
--- a/packages/circuits/tests/email-verifier.test.ts
+++ b/packages/circuits/tests/email-verifier.test.ts
@@ -254,7 +254,7 @@ describe("EmailVerifier : With body masking", () => {
                 maxBodyLength: 768,
                 ignoreBodyHashCheck: false,
                 turnOnBodyMasking: true,
-                mask,
+                mask: mask.map((value) => !!value),
             }
         );
 
diff --git a/packages/helpers/src/input-generators.ts b/packages/helpers/src/input-generators.ts
index 65262b99..45223c3c 100644
--- a/packages/helpers/src/input-generators.ts
+++ b/packages/helpers/src/input-generators.ts
@@ -12,7 +12,7 @@ type CircuitInput = {
   emailBodyLength?: string;
   precomputedSHA?: string[];
   bodyHashIndex?: string;
-  mask?: number[];
+  mask?: boolean[];
 };
 
 type InputGenerationArgs = {
@@ -21,7 +21,7 @@ type InputGenerationArgs = {
   shaPrecomputeSelector?: string;
   maxHeadersLength?: number; // Max length of the email header including padding
   maxBodyLength?: number; // Max length of the email body after shaPrecomputeSelector including padding
-  mask?: number[];
+  mask?: boolean[];
 };
 
 /**