diff --git a/languages.toml b/languages.toml
index 08d02a49ef00..da7b10bd0222 100644
--- a/languages.toml
+++ b/languages.toml
@@ -1440,7 +1440,7 @@ scope = "source.cairo"
 injection-regex = "cairo"
 file-types = ["cairo"]
 roots = []
-comment-token = "#"
+comment-token = "//"
 indent = { tab-width = 4, unit = "    " }
 
 [[grammar]]