diff --git a/package.json b/package.json
index 0e0bbf4..7b15594 100644
--- a/package.json
+++ b/package.json
@@ -35,6 +35,7 @@
     "@babel/plugin-transform-modules-commonjs": "^7.25.9",
     "@vitest/coverage-v8": "^2.1.5",
     "cheminfo-build": "^1.2.0",
+    "cheminfo-types": "^1.8.1",
     "codecov": "^3.8.3",
     "eslint": "^9.14.0",
     "eslint-config-cheminfo": "^12.0.1",
diff --git a/src/spectrum/getNormalized.js b/src/spectrum/getNormalized.js
index ccc3263..15b269b 100644
--- a/src/spectrum/getNormalized.js
+++ b/src/spectrum/getNormalized.js
@@ -4,7 +4,7 @@ import { xMinMaxValues, xyCheck } from 'ml-spectra-processing';
 /**
  *
  * @private
- * @param {DataXY} input
+ * @param {import('cheminfo-types').DataXY} input
  * @param {object} [options={}]
  * @param {number} [options.from=x[0]]
  * @param {number} [options.to=x[x.length-1]]