diff --git a/lib/datasource/packagist.js b/lib/datasource/packagist.js
index 5e41c4981f7c6f5b210b9f2df2ba578c2c5a1cde..7488f5e8e874721868ce12dd813792754fe5a245 100644
--- a/lib/datasource/packagist.js
+++ b/lib/datasource/packagist.js
@@ -81,6 +81,10 @@ async function getPackagistFile(regUrl, file) {
 
 function extractDepReleases(versions) {
   const dep = {};
+  // istanbul ignore if
+  if (!versions) {
+    return dep;
+  }
   dep.releases = Object.keys(versions)
     .filter(isVersion)
     .sort(sortVersions)