diff --git a/examples/fileserving.ru b/examples/fileserving.ru
new file mode 100644
index 0000000..27ff773
--- /dev/null
+++ b/examples/fileserving.ru
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require 'landline'
+
+class App < Landline::App
+  path "/outer" do
+    path "/inner" do
+      get "/oucher" do
+        "Hello world"
+      end
+      remap __dir__
+      serve "*"
+    end
+  end
+end
+
+run App.new
diff --git a/examples/uploader/files/.bashrc b/examples/uploader/files/.bashrc
deleted file mode 100644
index dfa913b..0000000
--- a/examples/uploader/files/.bashrc
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# ~/.bashrc
-#
-
-# If not running interactively, don't do anything
-[[ $- != *i* ]] && return
-
-# alias ls='ls --color=auto'
-# alias grep='grep --color=auto'
-# PS1='[\u@\h \W]\$ '
diff --git a/examples/uploader/form.ru b/examples/uploader/form.ru
index ac494d4..5aa1f93 100644
--- a/examples/uploader/form.ru
+++ b/examples/uploader/form.ru
@@ -3,8 +3,10 @@
 $LOAD_PATH.unshift("#{File.dirname(__FILE__)}/lib")
 require 'landline'
 
+ROOT=__dir__
+
 app = Landline::Server.new do
-  root ENV["PWD"]
+  root ROOT
   index ["index.html"]
   post "/" do
     formdata = form if form?
@@ -12,7 +14,7 @@ app = Landline::Server.new do
     if formdata
       formdata["form_files"].each do |file|
         filename = file.filename.split("/").last
-        `mv #{file.tempfile.path} $PWD/files/#{filename}`
+        `mv #{file.tempfile.path} #{ROOT}/files/#{filename}`
         files[file.filename] = "<a href=\"files/#{filename}\">#{filename}</a>"
       end
     end
diff --git a/examples/uploader/index.rhtml b/examples/uploader/index.rhtml
index 6abb370..5ee4606 100644
--- a/examples/uploader/index.rhtml
+++ b/examples/uploader/index.rhtml
@@ -1,4 +1,4 @@
-<!DOCTYPE>
+<!DOCTYPE html>
 <html>
     <head>
         <title>Form upload test</title>
@@ -7,6 +7,42 @@
         </style>
     </head>
     <body>
+        <script>
+function postFile() {
+  let progress = document.getElementById('progress')
+  
+  progress.style.display = 'block';
+
+  let formdata = new FormData();
+  
+  let files = document.getElementById('form_files').files;
+
+  for (const file of files) 
+  {
+    formdata.append('form_files[]', file);
+  }
+
+  let request = new XMLHttpRequest();
+  let filesize = 0;
+  for (const file of files) {
+    filesize = filesize + file.size;
+  }
+  console.log(filesize);
+
+  request.upload.addEventListener("progress", function(e) {
+    console.log(e.loaded);
+    if (e.loaded <= filesize) {
+      let percent = Math.round(e.loaded / filesize * 100);
+      progress.innerHTML = `${e.loaded} / ${filesize}`;
+    } else {
+      progress.innerHTML = 'Upload finished!';
+    }
+  });
+
+  request.open('post', '/');
+  request.send(formdata);
+}
+        </script>
         <h1>File uploader</h1>
         <hr/>
         <p> Add files here: <p>
@@ -15,8 +51,11 @@
               enctype="multipart/form-data">
             <input id="form_files" type="file" name="form_files[]" multiple>
             <label for="form_files">Attach file</label>
-            <input type="submit" value="Send form">
+            <button type="button" onclick="postFile();">"Send form"</button>
         </form>
+        <p id="progress" style="display: none;">
+        Loading
+        </p>
         <% if (defined? formdata) and formdata %>
         <hr>
         <ul>
diff --git a/landline.gemspec b/landline.gemspec
index 094baad..4338025 100644
--- a/landline.gemspec
+++ b/landline.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name                  = "landline"
-  spec.version               = "0.13.0"
+  spec.version               = "0.13.1"
   spec.summary               = "Elegant HTTP DSL"
   spec.description           = <<~DESC
     Landline is a no-hard-dependencies HTTP routing DSL that was made entirely for fun.
@@ -15,5 +15,5 @@ Gem::Specification.new do |spec|
   spec.homepage              = "https://adastra7.net/git/Yessiest/landline"
   spec.files                 = Dir["lib/**/*"]
   spec.extra_rdoc_files      = Dir["*.md"]
-  spec.required_ruby_version = ">= 3.0.6"
+  spec.required_ruby_version = ">= 3.0.0"
 end
diff --git a/lib/landline.rb b/lib/landline.rb
index c5ee72c..a08face 100644
--- a/lib/landline.rb
+++ b/lib/landline.rb
@@ -12,7 +12,7 @@ require_relative 'landline/app'
 # Landline is a backend framework born as a by-product of experimentation
 module Landline
   # Landline version
-  VERSION = '0.13.0 "Realign" (pre-alpha)'
+  VERSION = '0.13.1 "EDM Death Machine" (pre-alpha)'
 
   # Landline branding and version
   VLINE = "Landline/#{Landline::VERSION} (Ruby/#{RUBY_VERSION}/#{RUBY_RELEASE_DATE})\n".freeze
diff --git a/lib/landline/server.rb b/lib/landline/server.rb
index 532b1aa..4f6207e 100644
--- a/lib/landline/server.rb
+++ b/lib/landline/server.rb
@@ -27,6 +27,9 @@ module Landline
     def call(env)
       request = Landline::Request.new(env)
 
+      failed_msg = check_unicode(request)
+      return failed_msg.finalize if failed_msg
+
       response = handle_jumps(request)
       request.run_postprocessors(response)
       resp = response.finalize
@@ -54,6 +57,22 @@ module Landline
       response
     end
 
+    # Check that all important parameters are actually valid unicode
+    def check_unicode(request)
+      return false if request.path.valid_encoding? &&
+                      request.query.query.valid_encoding? &&
+                      request.server_name.valid_encoding?
+
+      response = Landline::Response.convert(
+        @properties["handle.default"].call(
+          400,
+          backtrace: ["Invalid unicode string"]
+        )
+      )
+      response.status = 400
+      response
+    end
+
     # Inititalization block for property setup
     def setup_properties(*_args, **_opts)
       {
