diff --git a/package.json b/package.json
index 0578062..829f506 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "esdoc-inject-script-plugin": "1.0.0",
     "esdoc-inject-style-plugin": "1.0.0",
     "esdoc-standard-plugin": "1.0.0",
-    "np": "6.3.0",
+    "np": "6.3.1",
     "nyc": "15.1.0",
     "regenerator-runtime": "0.13.5",
     "xo": "0.32.1"
diff --git a/yarn.lock b/yarn.lock
index 52a086e..35c831d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5605,10 +5605,10 @@ normalize-url@^4.1.0:
   resolved "https://registry.yarnpkg.com/normalize-url/-/normalize-url-4.5.0.tgz#453354087e6ca96957bd8f5baf753f5982142129"
   integrity sha512-2s47yzUxdexf1OhyRi4Em83iQk0aPvwTddtFz4hnSSw9dCEsLEGf6SwIO8ss/19S9iBb5sJaOuTvTGDeZI00BQ==
 
-np@6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/np/-/np-6.3.0.tgz#061d1f3c2b7e2307b14c49547879b358b31acc07"
-  integrity sha512-UwXhgmuzgkJHqflf2sCVdeCn2P9auKlcjQ/L37o9ORQe0O+mbrNhU04PBoLcdW+sMu3gCSx/uGBx79iL1sp9qg==
+np@6.3.1:
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/np/-/np-6.3.1.tgz#e859b6d2a0ccf016390655627cb02f8e67f0170b"
+  integrity sha512-vLCqfM/r/GeJLhdiodeOPzY3ZKuaLb+qLA5M9XXSRuyu513punk2DWtswMha1qCa56CvTQPmxgwEyP93XQlgQg==
   dependencies:
     "@samverschueren/stream-to-observable" "^0.3.0"
     any-observable "^0.5.0"