diff --git a/api/top-langs.js b/api/top-langs.js
index e67d9533..910473ac 100644
--- a/api/top-langs.js
+++ b/api/top-langs.js
@@ -41,6 +41,8 @@ export default async (req, res) => {
   if (locale && !isLocaleAvailable(locale)) {
     return res.send(renderError("Something went wrong", "Locale not found"));
   }
+  
+  theme = theme.replace(/-/g, "_")
 
   try {
     const topLangs = await fetchTopLanguages(