diff --git a/docs/src/extensions/languages.md b/docs/src/extensions/languages.md
index 257c3ff18b..d090e4a1c7 100644
--- a/docs/src/extensions/languages.md
+++ b/docs/src/extensions/languages.md
@@ -54,7 +54,7 @@ repository = "https://github.com/gleam-lang/tree-sitter-gleam"
 rev = "58b7cac8fc14c92b0677c542610d8738c373fa81"
 ```
 
-The `repository` field must specify a repository where the Tree-sitter grammar should be loaded from, and the `rev` field must contain a Git revision to use, such as the SHA of a Git commit. An extension can provide multiple grammars by referencing multiple tree-sitter repositories.
+The `repository` field must specify a repository where the Tree-sitter grammar should be loaded from, and the `rev` field must contain a Git revision to use, such as the SHA of a Git commit. If you're developing an extension locally and want to load a grammar from the local filesystem, you can use a `file://` URL for `repository`. An extension can provide multiple grammars by referencing multiple tree-sitter repositories.
 
 ## Tree-sitter Queries