diff --git a/crates/ptth_server/src/file_server.rs b/crates/ptth_server/src/file_server.rs
index cacf115..68aaf62 100644
--- a/crates/ptth_server/src/file_server.rs
+++ b/crates/ptth_server/src/file_server.rs
@@ -5,7 +5,7 @@
 
 use std::{
 	cmp::min,
-	collections::HashMap,
+	collections::*,
 	convert::{Infallible, TryFrom},
 	io::SeekFrom,
 	path::{
@@ -56,6 +56,7 @@ use errors::FileServerError;
 #[derive (Default)]
 pub struct Config {
 	pub file_server_root: PathBuf,
+	pub file_server_roots: BTreeMap <String, PathBuf>,
 }
 
 pub struct FileServer {
@@ -68,7 +69,7 @@ pub struct FileServer {
 
 impl FileServer {
 	pub fn new (
-		file_server_root: PathBuf,
+		config: Config,
 		asset_root: &Path,
 		name: String,
 		metrics_interval: Arc <ArcSwap <Option <metrics::Interval>>>,
@@ -76,9 +77,7 @@ impl FileServer {
 	) -> Result <Self, FileServerError>
 	{
 		Ok (Self {
-			config: Config {
-				file_server_root,
-			},
+			config,
 			handlebars: load_templates (asset_root)?,
 			metrics_startup: metrics::Startup::new (name),
 			metrics_interval,
@@ -374,9 +373,12 @@ impl FileServer {
 			resp
 		}
 		
-		let root: &std::path::Path = &self.config.file_server_root;
+		let roots = internal::FileRoots {
+			files: &self.config.file_server_root,
+			dirs: &self.config.file_server_roots,
+		};
 		
-		Ok (match internal::serve_all (root, method, uri, headers, self.hidden_path.as_deref ()).await? {
+		Ok (match internal::serve_all (roots, method, uri, headers, self.hidden_path.as_deref ()).await? {
 			Favicon => serve_error (StatusCode::NotFound, "Not found\n"),
 			Forbidden => serve_error (StatusCode::Forbidden, "403 Forbidden\n"),
 			MethodNotAllowed => serve_error (StatusCode::MethodNotAllowed, "Unsupported method\n"),
diff --git a/crates/ptth_server/src/file_server/internal.rs b/crates/ptth_server/src/file_server/internal.rs
index 1c29fd3..c052a35 100644
--- a/crates/ptth_server/src/file_server/internal.rs
+++ b/crates/ptth_server/src/file_server/internal.rs
@@ -4,7 +4,7 @@
 // human-readable HTML
 
 use std::{
-	collections::HashMap,
+	collections::*,
 	path::{Path, PathBuf},
 };
 
@@ -244,11 +244,17 @@ async fn serve_api (
 	Ok (NotFound)
 }
 
+#[derive (Clone, Copy)]
+pub struct FileRoots <'a> {
+	pub files: &'a Path,
+	pub dirs: &'a BTreeMap <String, PathBuf>,
+}
+
 // Handle the requests internally without knowing anything about PTTH or
 // HTML / handlebars
 
 pub async fn serve_all (
-	root: &Path,
+	roots: FileRoots <'_>,
 	method: Method,
 	uri: &str,
 	headers: &HashMap <String, Vec <u8>>,
@@ -283,7 +289,7 @@ pub async fn serve_all (
 	}
 	
 	if let Some (path) = path.strip_prefix ("/api") {
-		return serve_api (root, &uri, hidden_path, path).await;
+		return serve_api (roots.files, &uri, hidden_path, path).await;
 	}
 	
 	let path = match path.strip_prefix ("/files/") {
@@ -298,7 +304,7 @@ pub async fn serve_all (
 	let path_s = percent_decode (encoded_path.as_bytes ()).decode_utf8 ().map_err (FileServerError::PathNotUtf8)?;
 	let path = Path::new (&*path_s);
 	
-	let full_path = root.join (path);
+	let full_path = roots.files.join (path);
 	
 	trace! ("full_path = {:?}", full_path);
 	
diff --git a/crates/ptth_server/src/lib.rs b/crates/ptth_server/src/lib.rs
index c90093d..2a50548 100644
--- a/crates/ptth_server/src/lib.rs
+++ b/crates/ptth_server/src/lib.rs
@@ -319,7 +319,10 @@ pub async fn run_server (
 	});
 	
 	let file_server = file_server::FileServer::new (
-		config_file.file_server_root.clone (),
+		file_server::Config {
+			file_server_root: config_file.file_server_root.clone (),
+			file_server_roots: config_file.file_server_roots.clone (),
+		},
 		&asset_root.clone ().unwrap_or_else (|| PathBuf::from (".")),
 		config_file.name.clone (),
 		metrics_interval,