diff --git a/.changes/dialog-file-response-non-exhaustive.md b/.changes/dialog-file-response-non-exhaustive.md
new file mode 100644
index 00000000..f8d45d80
--- /dev/null
+++ b/.changes/dialog-file-response-non-exhaustive.md
@@ -0,0 +1,5 @@
+---
+"dialog": "patch"
+---
+
+Mark `FileResponse` as `non_exhaustive`.
diff --git a/plugins/dialog/src/lib.rs b/plugins/dialog/src/lib.rs
index b57cc44c..c9b1688f 100644
--- a/plugins/dialog/src/lib.rs
+++ b/plugins/dialog/src/lib.rs
@@ -218,6 +218,7 @@ impl<R: Runtime> MessageDialogBuilder<R> {
 
 #[derive(Debug, Deserialize, Serialize, Default)]
 #[serde(rename_all = "camelCase")]
+#[non_exhaustive]
 pub struct FileResponse {
     pub base64_data: Option<String>,
     pub duration: Option<u64>,