diff --git a/pkgs/dart_mcp/CHANGELOG.md b/pkgs/dart_mcp/CHANGELOG.md
index 69a03d6..e0e6f97 100644
--- a/pkgs/dart_mcp/CHANGELOG.md
+++ b/pkgs/dart_mcp/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 - Update workflow example to show thinking spinner and input and output token
   usage.
+- Update file system example to support relative paths.
 
 ## 0.2.0
 
diff --git a/pkgs/dart_mcp/example/file_system_server.dart b/pkgs/dart_mcp/example/file_system_server.dart
index 6f994b6..40b3121 100644
--- a/pkgs/dart_mcp/example/file_system_server.dart
+++ b/pkgs/dart_mcp/example/file_system_server.dart
@@ -54,7 +54,8 @@ final class SimpleFileSystemServer extends MCPServer
   /// Returns `null` if [path] is valid.
   Future<CallToolResult?> _checkAllowedPath(String path) async {
     for (var root in await roots) {
-      if (root.uri == path || p.isWithin(root.uri, path)) {
+      final resolvedPath = Uri.parse(root.uri).resolve(path).toString();
+      if (root.uri == resolvedPath || p.isWithin(root.uri, resolvedPath)) {
         return null;
       }
     }