diff --git a/main.go b/main.go
index 9bf601f..b7ad0b8 100644
--- a/main.go
+++ b/main.go
@@ -355,6 +355,7 @@ func licenseHeader(path string, tmpl *template.Template, data licenseData) ([]by
 	case
 		".html", ".htm",
 		".vue",
+		".svelte",
 		".wxi", ".wxl", ".wxs",
 		".xml":
 		lic, err = executeTemplate(tmpl, data, "<!--", " ", "-->")
diff --git a/testdata/expected/file.svelte b/testdata/expected/file.svelte
new file mode 100644
index 0000000..9247440
--- /dev/null
+++ b/testdata/expected/file.svelte
@@ -0,0 +1,22 @@
+<!--
+ Copyright 2018 Google LLC
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+
+<script>
+
+</script>
+
+<div>hello world</div>
+
diff --git a/testdata/initial/file.svelte b/testdata/initial/file.svelte
new file mode 100644
index 0000000..94827b2
--- /dev/null
+++ b/testdata/initial/file.svelte
@@ -0,0 +1,6 @@
+<script>
+
+</script>
+
+<div>hello world</div>
+