diff --git a/package.json b/package.json
index 86586d8..4e295fb 100644
--- a/package.json
+++ b/package.json
@@ -38,22 +38,22 @@
   },
   "homepage": "https://github.com/mljs/signal-processing#readme",
   "devDependencies": {
-    "@types/jest": "^29.5.0",
-    "eslint": "^8.36.0",
-    "eslint-config-cheminfo-typescript": "^11.3.1",
-    "jest": "^29.5.0",
+    "@types/jest": "^29.5.12",
+    "eslint": "^8.57.0",
+    "eslint-config-cheminfo-typescript": "^12.2.0",
+    "jest": "^29.7.0",
     "jest-matcher-deep-close-to": "^3.0.2",
-    "prettier": "^2.8.7",
-    "rimraf": "^4.4.1",
-    "ts-jest": "^29.0.5",
-    "typescript": "^5.0.2",
-    "typescript-json-schema": "^0.55.0"
+    "prettier": "^3.2.5",
+    "rimraf": "^5.0.5",
+    "ts-jest": "^29.1.2",
+    "typescript": "^5.4.2",
+    "typescript-json-schema": "^0.63.0"
   },
   "dependencies": {
-    "baselines": "^1.1.5",
-    "cheminfo-types": "^1.4.0",
-    "ml-gsd": "^12.1.3",
+    "baselines": "^1.1.7",
+    "cheminfo-types": "^1.7.2",
+    "ml-gsd": "^12.1.5",
     "ml-savitzky-golay-generalized": "^4.0.1",
-    "ml-spectra-processing": "^12.0.0"
+    "ml-spectra-processing": "^14.2.0"
   }
 }
diff --git a/src/filterMatrix.ts b/src/filterMatrix.ts
index 08793ce..5719caf 100644
--- a/src/filterMatrix.ts
+++ b/src/filterMatrix.ts
@@ -8,7 +8,7 @@ export function filterMatrix(
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   filters: FilterMatrixType[],
 ) {
-  let result = {
+  const result = {
     data: matrix,
   };
 
diff --git a/src/filterXY.ts b/src/filterXY.ts
index 3ddf79b..6131185 100644
--- a/src/filterXY.ts
+++ b/src/filterXY.ts
@@ -15,7 +15,7 @@ export function filterXY(data: DataXY, filters: FilterXYType[]) {
 
   const logs = [];
 
-  for (let filter of filters) {
+  for (const filter of filters) {
     const start = Date.now();
     // eslint-disable-next-line import/namespace
     const filterFct = Filters[filter.name];
diff --git a/src/filters/sg/__tests__/firstDerivative.test.ts b/src/filters/sg/__tests__/firstDerivative.test.ts
index a4a141a..6e4b525 100644
--- a/src/filters/sg/__tests__/firstDerivative.test.ts
+++ b/src/filters/sg/__tests__/firstDerivative.test.ts
@@ -6,7 +6,7 @@ import { firstDerivative } from '../firstDerivative';
 expect.extend({ toBeDeepCloseTo, toMatchCloseTo });
 
 test('firstDerivative', () => {
-  let result = firstDerivative(linear);
+  const result = firstDerivative(linear);
   expect(result.data).toMatchCloseTo({
     x: Float64Array.from([1, 2, 3, 4, 5, 6, 7, 8, 9]),
     y: Float64Array.from([
diff --git a/src/filters/sg/__tests__/savitzkyGolay.test.ts b/src/filters/sg/__tests__/savitzkyGolay.test.ts
index b434b49..2244b01 100644
--- a/src/filters/sg/__tests__/savitzkyGolay.test.ts
+++ b/src/filters/sg/__tests__/savitzkyGolay.test.ts
@@ -6,7 +6,7 @@ import { savitzkyGolay } from '../savitzkyGolay';
 expect.extend({ toBeDeepCloseTo, toMatchCloseTo });
 
 test('savitzkyGolay', () => {
-  let result = savitzkyGolay(linear, {
+  const result = savitzkyGolay(linear, {
     derivative: 1,
   });
   expect(result.data).toMatchCloseTo({
diff --git a/src/filters/sg/__tests__/secondDerivative.test.ts b/src/filters/sg/__tests__/secondDerivative.test.ts
index 75c3fd3..2e5b708 100644
--- a/src/filters/sg/__tests__/secondDerivative.test.ts
+++ b/src/filters/sg/__tests__/secondDerivative.test.ts
@@ -6,7 +6,7 @@ import { secondDerivative } from '../secondDerivative';
 expect.extend({ toBeDeepCloseTo, toMatchCloseTo });
 
 test('secondDerivative', () => {
-  let result = secondDerivative(linear);
+  const result = secondDerivative(linear);
   expect(result.data).toMatchCloseTo({
     x: Float64Array.from([1, 2, 3, 4, 5, 6, 7, 8, 9]),
     y: Float64Array.from([
diff --git a/src/filters/sg/__tests__/thirdDerivate.test.ts b/src/filters/sg/__tests__/thirdDerivate.test.ts
index 6ae644a..b055a43 100644
--- a/src/filters/sg/__tests__/thirdDerivate.test.ts
+++ b/src/filters/sg/__tests__/thirdDerivate.test.ts
@@ -6,7 +6,7 @@ import { thirdDerivative } from '../thirdDerivative';
 expect.extend({ toBeDeepCloseTo, toMatchCloseTo });
 
 test('thirdDerivative', () => {
-  let result = thirdDerivative(linear);
+  const result = thirdDerivative(linear);
   expect(result.data).toMatchCloseTo({
     x: Float64Array.from([1, 2, 3, 4, 5, 6, 7, 8, 9]),
     y: Float64Array.from([0, 0, 0, 0, 0, 0, 0, 0, 0]),
diff --git a/src/filters/x/__tests__/calibrateX.test.ts b/src/filters/x/__tests__/calibrateX.test.ts
index 6e27c9b..1c79939 100644
--- a/src/filters/x/__tests__/calibrateX.test.ts
+++ b/src/filters/x/__tests__/calibrateX.test.ts
@@ -6,12 +6,12 @@ expect.extend({ toBeDeepCloseTo, toMatchCloseTo });
 
 describe('calibrateX', () => {
   it('undefined params', () => {
-    let data = {
+    const data = {
       x: Float64Array.from([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]),
       y: Float64Array.from([1, 1, 1, 1, 1, 1, 700, 1, 1, 1, 1, 1, 1]),
     };
 
-    let shifted = calibrateX(data);
+    const shifted = calibrateX(data);
     expect(shifted.data.x).toMatchCloseTo(
       Float64Array.from([-6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6]),
     );
@@ -19,7 +19,7 @@ describe('calibrateX', () => {
   });
 
   it('too small data', () => {
-    let data = {
+    const data = {
       x: Float64Array.from([0, 1, 2, 3]),
       y: Float64Array.from([1, 1, 5, 1]),
     };
@@ -29,12 +29,12 @@ describe('calibrateX', () => {
   });
 
   it('no shift', () => {
-    let data = {
+    const data = {
       x: Float64Array.from([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]),
       y: Float64Array.from([1, 1, 5, 1, 1, 1, 700, 1, 1, 1, 1, 1, 1]),
     };
 
-    let gsdOptions = {
+    const gsdOptions = {
       minMaxRatio: 0.4,
       realTopDetection: true,
       smoothY: true,
@@ -44,7 +44,7 @@ describe('calibrateX', () => {
       },
     };
 
-    let shifted = calibrateX(data, {
+    const shifted = calibrateX(data, {
       from: 1,
       to: 10,
       targetX: 6,
@@ -58,12 +58,12 @@ describe('calibrateX', () => {
   });
 
   it('shift of 2', () => {
-    let data = {
+    const data = {
       x: Float64Array.from([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]),
       y: Float64Array.from([1, 1, 1, 1, 700, 1, 5, 1, 1, 1, 1, 1, 1]),
     };
 
-    let gsdOptions = {
+    const gsdOptions = {
       minMaxRatio: 0.4,
       realTopDetection: true,
       smoothY: true,
@@ -73,7 +73,7 @@ describe('calibrateX', () => {
       },
     };
 
-    let shifted = calibrateX(data, {
+    const shifted = calibrateX(data, {
       targetX: 6,
       gsd: gsdOptions,
       from: 1,
@@ -89,7 +89,7 @@ describe('calibrateX', () => {
   });
 
   it('2 peaks', () => {
-    let data = {
+    const data = {
       x: Float64Array.from([
         0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
         20,
@@ -99,7 +99,7 @@ describe('calibrateX', () => {
       ]),
     };
 
-    let gsdOptions = {
+    const gsdOptions = {
       minMaxRatio: 0.4,
       realTopDetection: true,
       smoothY: true,
@@ -109,7 +109,7 @@ describe('calibrateX', () => {
       },
     };
 
-    let shifted = calibrateX(data, {
+    const shifted = calibrateX(data, {
       targetX: 6,
       gsd: gsdOptions,
       nbPeaks: 2,
diff --git a/src/filters/x/calibrateX.ts b/src/filters/x/calibrateX.ts
index dde7fd6..7cc1a07 100644
--- a/src/filters/x/calibrateX.ts
+++ b/src/filters/x/calibrateX.ts
@@ -55,7 +55,7 @@ export function calibrateX(
   const fromIndex = xFindClosestIndex(data.x, from);
   const toIndex = xFindClosestIndex(data.x, to);
 
-  let peaks = gsd(
+  const peaks = gsd(
     {
       x: data.x.subarray(fromIndex, toIndex),
       y: data.y.subarray(fromIndex, toIndex),