diff --git a/pxtarget.json b/pxtarget.json
index 09922bf75e8..0a034a51712 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -532,6 +532,7 @@
             "ru",
             "si-LK",
             "sk",
+            "sl",
             "sr",
             "sv-SE",
             "tr",