diff --git a/docs/tinymist/frontend/helix.typ b/docs/tinymist/frontend/helix.typ
index 5d6c48af..13bf7614 100644
--- a/docs/tinymist/frontend/helix.typ
+++ b/docs/tinymist/frontend/helix.typ
@@ -72,7 +72,7 @@ To enable a live preview you can use the `preview.background`:
 ```toml
 [language-server.tinymist]
 command = "tinymist"
-config = { preview.background.enabled = true", preview.background.args = ["--data-plane-host=127.0.0.1:23635", "--invert-colors=never", "--open"] }
+config = { preview.background.enabled = "true", preview.background.args = ["--data-plane-host=127.0.0.1:23635", "--invert-colors=never", "--open"] }
 ```
 
 See #github-link("/editors/neovim/Configuration.md")[Tinymist Server Configuration]
diff --git a/editors/helix/README.md b/editors/helix/README.md
index 833c12b0..d25c48e9 100644
--- a/editors/helix/README.md
+++ b/editors/helix/README.md
@@ -77,7 +77,7 @@ To enable a live preview you can use the `preview.background`:
 ```toml
 [language-server.tinymist]
 command = "tinymist"
-config = { preview.background.enabled = true", preview.background.args = ["--data-plane-host=127.0.0.1:23635", "--invert-colors=never", "--open"] }
+config = { preview.background.enabled = "true", preview.background.args = ["--data-plane-host=127.0.0.1:23635", "--invert-colors=never", "--open"] }
 ```
 
 See [Tinymist Server Configuration](/editors/neovim/Configuration.md) for references.