diff --git a/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix b/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
index 5adf5f2b26a4..2f0274ef8a8f 100644
--- a/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
+++ b/pkgs/development/tools/parsing/tree-sitter/grammars/grammar-sources.nix
@@ -697,7 +697,7 @@
   };
 
   toml = {
-    version = "0-unstable-2022-04-21";
+    version = "0.5.1-unstable-2022-04-21";
     url = "github:tree-sitter/tree-sitter-toml/342d9be207c2dba869b9967124c679b5e6fd0ebe";
     hash = "sha256-V2c7K16g8PikE9eNgrM6iUDiu4kzBvHMFQwfkph+8QI=";
   };