diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..caa0452
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1 @@
+packages/helpers/src/lib
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..28d58de
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,5 @@
+{
+  "semi": true,
+  "tabWidth": 2,
+  "printWidth": 120
+}
diff --git a/package.json b/package.json
index 300d1fe..3db33fb 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "license": "MIT",
   "private": true,
   "scripts": {
+    "lint": "yarn prettier --write packages/**/**.ts",
     "test": "jest"
   },
   "workspaces": [
@@ -12,5 +13,8 @@
   "packageManager": "yarn@3.2.3",
   "engines": {
     "node": ">=14.0.0"
+  },
+  "devDependencies": {
+    "prettier": "^3.3.3"
   }
 }
diff --git a/packages/circuits/tests/byte-mask.test.ts b/packages/circuits/tests/byte-mask.test.ts
index bafbfc4..dbfa8b3 100644
--- a/packages/circuits/tests/byte-mask.test.ts
+++ b/packages/circuits/tests/byte-mask.test.ts
@@ -43,5 +43,7 @@ describe("ByteMask Circuit", () => {
         } catch (error) {
             expect(error).toBeTruthy();
         }
+
+        expect.assertions(1);
     });
 });
diff --git a/packages/circuits/tests/remove-soft-line-breaks.test.ts b/packages/circuits/tests/remove-soft-line-breaks.test.ts
index 9b2d0ed..5d14f7d 100644
--- a/packages/circuits/tests/remove-soft-line-breaks.test.ts
+++ b/packages/circuits/tests/remove-soft-line-breaks.test.ts
@@ -2,6 +2,8 @@ import { wasm as wasm_tester } from 'circom_tester';
 import path from 'path';
 
 describe('RemoveSoftLineBreaks', () => {
+  jest.setTimeout(20_1000);
+
   let circuit: any;
 
   beforeAll(async () => {
diff --git a/packages/circuits/tests/select-regex-reveal.test.ts b/packages/circuits/tests/select-regex-reveal.test.ts
index cd3f3b8..c18cfd6 100644
--- a/packages/circuits/tests/select-regex-reveal.test.ts
+++ b/packages/circuits/tests/select-regex-reveal.test.ts
@@ -20,10 +20,7 @@ describe("Select Regex Reveal", () => {
     });
 
     it("should reveal the substring with maximum revealed length", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
+        let input = new Array(34).fill(0);
         const startIndex = Math.floor(Math.random() * 24);
         const revealed = Array.from("zk email").map((char) =>
             char.charCodeAt(0)
@@ -40,10 +37,7 @@ describe("Select Regex Reveal", () => {
     });
 
     it("should reveal the substring with non-maximum revealed length", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
+        let input = new Array(34).fill(0);
         const startIndex = 30;
         const revealed = Array.from("zk").map((char) => char.charCodeAt(0));
         for (let i = 0; i < revealed.length; i++) {
@@ -60,11 +54,8 @@ describe("Select Regex Reveal", () => {
     });
 
     it("should fail when all zero", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
-        const startIndex = Math.floor(Math.random() * 32);
+        let input = new Array(34).fill(0);
+        const startIndex = Math.floor(Math.random() * 34);
         try {
             const witness = await circuit.calculateWitness({
                 in: input,
@@ -74,13 +65,12 @@ describe("Select Regex Reveal", () => {
         } catch (error) {
             expect((error as Error).message).toMatch("Assert Failed");
         }
+
+        expect.assertions(1);
     });
 
     it("should fail when startIndex is 0", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
+        let input = new Array(34).fill(0);
         const startIndex = 1 + Math.floor(Math.random() * 24);
         const revealed = Array.from("zk email").map((char) =>
             char.charCodeAt(0)
@@ -97,13 +87,12 @@ describe("Select Regex Reveal", () => {
         } catch (error) {
             expect((error as Error).message).toMatch("Assert Failed");
         }
+
+        expect.assertions(1);
     });
 
     it("should fail when startIndex is not before 0", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
+        let input = new Array(34).fill(0);
         const startIndex = Math.floor(Math.random() * 23);
         const revealed = Array.from("zk email").map((char) =>
             char.charCodeAt(0)
@@ -120,28 +109,7 @@ describe("Select Regex Reveal", () => {
         } catch (error) {
             expect((error as Error).message).toMatch("Assert Failed");
         }
-    });
 
-    it("should fail when startIndex is larger than max length", async function () {
-        let input = [
-            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-            0, 0, 0, 0, 0, 0, 0, 0, 0,
-        ];
-        const startIndex = Math.floor(Math.random() * 24);
-        const revealed = Array.from("zk email").map((char) =>
-            char.charCodeAt(0)
-        );
-        for (let i = 0; i < revealed.length; i++) {
-            input[startIndex + i] = revealed[i];
-        }
-        try {
-            const witness = await circuit.calculateWitness({
-                in: input,
-                startIndex: 32,
-            });
-            await circuit.checkConstraints(witness);
-        } catch (error) {
-            expect((error as Error).message).toMatch("Assert Failed");
-        }
+        expect.assertions(1);
     });
 });
diff --git a/packages/circuits/tests/splitBytesToWords.test.ts b/packages/circuits/tests/split-bytes-to-words.test.ts
similarity index 93%
rename from packages/circuits/tests/splitBytesToWords.test.ts
rename to packages/circuits/tests/split-bytes-to-words.test.ts
index 93019ab..99fc83e 100644
--- a/packages/circuits/tests/splitBytesToWords.test.ts
+++ b/packages/circuits/tests/split-bytes-to-words.test.ts
@@ -9,7 +9,7 @@ describe("SplitBytesToWords Helper unit test", () => {
 
     beforeAll(async () => {
         circuit = await wasm_tester(
-            path.join(__dirname, "./test-circuits/splitBytesToWords-test.circom"),
+            path.join(__dirname, "./test-circuits/split-bytes-to-words-test.circom"),
             {
                 recompile: true,
                 include: path.join(__dirname, "../../../node_modules"),
diff --git a/packages/circuits/tests/test-circuits/select-regex-reveal-test.circom b/packages/circuits/tests/test-circuits/select-regex-reveal-test.circom
index 1ae9a8c..2477371 100644
--- a/packages/circuits/tests/test-circuits/select-regex-reveal-test.circom
+++ b/packages/circuits/tests/test-circuits/select-regex-reveal-test.circom
@@ -2,4 +2,4 @@ pragma circom 2.1.6;
 
 include "../../utils/regex.circom";
 
-component main = SelectRegexReveal(32,8);
\ No newline at end of file
+component main = SelectRegexReveal(34, 8);
\ No newline at end of file
diff --git a/packages/circuits/tests/test-circuits/splitBytesToWords-test.circom b/packages/circuits/tests/test-circuits/split-bytes-to-words-test.circom
similarity index 100%
rename from packages/circuits/tests/test-circuits/splitBytesToWords-test.circom
rename to packages/circuits/tests/test-circuits/split-bytes-to-words-test.circom
diff --git a/packages/circuits/utils/regex.circom b/packages/circuits/utils/regex.circom
index dd7ef74..1745a6f 100644
--- a/packages/circuits/utils/regex.circom
+++ b/packages/circuits/utils/regex.circom
@@ -27,10 +27,6 @@ template SelectRegexReveal(maxArrayLen, maxRevealLen) {
     signal isPreviousZero[maxArrayLen];
     signal isAboveMaxRevealLen[maxArrayLen];
 
-    // Assert startIndex < maxArrayLen
-    signal isValidStartIndex <== LessThan(bitLength)([startIndex, maxArrayLen]);
-    isValidStartIndex === 1;
-
     isPreviousZero[0] <== 1;
     for(var i = 0; i < maxArrayLen; i++) {
         isStartIndex[i] <== IsEqual()([i, startIndex]);
diff --git a/yarn.lock b/yarn.lock
index d144c86..6a20f56 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7168,6 +7168,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"prettier@npm:^3.3.3":
+  version: 3.3.3
+  resolution: "prettier@npm:3.3.3"
+  bin:
+    prettier: bin/prettier.cjs
+  checksum: bc8604354805acfdde6106852d14b045bb20827ad76a5ffc2455b71a8257f94de93f17f14e463fe844808d2ccc87248364a5691488a3304f1031326e62d9276e
+  languageName: node
+  linkType: hard
+
 "pretty-format@npm:^29.0.0, pretty-format@npm:^29.7.0":
   version: 29.7.0
   resolution: "pretty-format@npm:29.7.0"
@@ -7455,6 +7464,8 @@ __metadata:
 "root-workspace-0b6124@workspace:.":
   version: 0.0.0-use.local
   resolution: "root-workspace-0b6124@workspace:."
+  dependencies:
+    prettier: ^3.3.3
   languageName: unknown
   linkType: soft