diff --git a/lib/modules/datasource/docker/common.ts b/lib/modules/datasource/docker/common.ts
index b838b25d8898e5594450ab0952d04070f2ea4290..836872e2e2983a914086a350a426df565dc872a2 100644
--- a/lib/modules/datasource/docker/common.ts
+++ b/lib/modules/datasource/docker/common.ts
@@ -341,7 +341,7 @@ export function findLatestStable(tags: string[]): string | null {
   return stable;
 }
 
-const chartRepo = regEx(/charts?|helm|helm-charts/i);
+const chartRepo = regEx(/charts?|helm|helm-charts?/i);
 
 function isPossibleChartRepo(url: string): boolean {
   if (detectPlatform(url) === null) {