diff --git a/runtime/plugins/comment/comment.lua b/runtime/plugins/comment/comment.lua
index 213d2bff9..034c49049 100644
--- a/runtime/plugins/comment/comment.lua
+++ b/runtime/plugins/comment/comment.lua
@@ -28,6 +28,7 @@ ft["ini"] = "; %s"
 ft["java"] = "// %s"
 ft["javascript"] = "// %s"
 ft["jinja2"] = "{# %s #}"
+ft["json"] = "// %s"
 ft["julia"] = "# %s"
 ft["kotlin"] = "// %s"
 ft["lua"] = "-- %s"
diff --git a/runtime/plugins/comment/help/comment.md b/runtime/plugins/comment/help/comment.md
index cf1847b9b..74054cd15 100644
--- a/runtime/plugins/comment/help/comment.md
+++ b/runtime/plugins/comment/help/comment.md
@@ -47,6 +47,7 @@ but it is only available for certain filetypes:
 * java: `// %s`
 * javascript: `// %s`
 * jinja2: `{# %s #}`
+* json: `// %s`
 * julia: `# %s`
 * kotlin: `// %s`
 * lua: `-- %s`