diff --git a/lib/datasource/npm.js b/lib/datasource/npm.js
index 00b34b300af430048f36ca379cdfc3c2a9e8b9f4..667dfa5caa32289be041f3b585f04bcceb931eb3 100644
--- a/lib/datasource/npm.js
+++ b/lib/datasource/npm.js
@@ -75,6 +75,7 @@ function setNpmrc(input, exposeEnv = false) {
   } else if (npmrc) {
     logger.debug('Resetting npmrc');
     npmrc = null;
+    npmrcRaw = null;
   }
 }