diff --git a/src/action.js b/src/action.js
index f1d16637..ab925c6b 100644
--- a/src/action.js
+++ b/src/action.js
@@ -18,6 +18,7 @@ const LANG_TO_EXTENSION = {
   'php': 'php',
   'python': 'py',
   'python3': 'py',
+  'pythondata': 'py',
   'ruby': 'rb',
   'rust': 'rs',
   'scala': 'scala',