diff --git a/renovate.json b/renovate.json
index 51408e5..3436da7 100644
--- a/renovate.json
+++ b/renovate.json
@@ -9,7 +9,7 @@
         {
           "customType": "regex",
           "fileMatch": ["Dockerfile"],
-          "matchStrings": ["ARG ACT_VERSION=[\"](?<currentValue>.*)[\"]"],
+          "matchStrings": ["ARG ACT_VERSION=(?<currentValue>.*)"],
           "datasourceTemplate": "gitea-releases",
           "depNameTemplate": "gitea/act_runner"
         }