diff --git a/package.json b/package.json
index ae685e3..3814633 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "multivariate-gaussian": "^3.3.1",
     "ndarray-determinant": "^1.0.0",
     "ndarray-pack": "^1.2.1",
-    "npm": "^4.5.0",
+    "npm": "^6.14.6",
     "numeric": "^1.2.6",
     "snowball-german": "^1.0.0",
     "stemmer": "^1.0.0",