diff --git a/lib/telebugs.rb b/lib/telebugs.rb
index 6123798..b1114d9 100644
--- a/lib/telebugs.rb
+++ b/lib/telebugs.rb
@@ -20,6 +20,7 @@
 require_relative "telebugs/truncator"
 
 require_relative "telebugs/middleware/gem_root_filter"
+require_relative "telebugs/middleware/root_directory_filter"
 
 module Telebugs
   # The general error that this library uses when it wants to raise.
diff --git a/lib/telebugs/config.rb b/lib/telebugs/config.rb
index 7ba6ef5..663cfda 100644
--- a/lib/telebugs/config.rb
+++ b/lib/telebugs/config.rb
@@ -5,10 +5,10 @@ class Config
     ERROR_API_URL = "https://api.telebugs.com/2024-03-28/errors"
 
     attr_accessor :api_key,
-      :root_directory,
       :middleware
 
-    attr_reader :api_url
+    attr_reader :api_url,
+      :root_directory
 
     class << self
       attr_writer :instance
@@ -26,6 +26,15 @@ def api_url=(url)
       @api_url = URI(url)
     end
 
+    def root_directory=(directory)
+      @root_directory = File.realpath(directory)
+
+      if @middleware
+        @middleware.delete(Middleware::RootDirectoryFilter)
+        @middleware.use Middleware::RootDirectoryFilter.new(@root_directory)
+      end
+    end
+
     def reset
       self.api_key = nil
       self.api_url = ERROR_API_URL
@@ -36,6 +45,7 @@ def reset
 
       @middleware = MiddlewareStack.new
       @middleware.use Middleware::GemRootFilter.new
+      @middleware.use Middleware::RootDirectoryFilter.new(root_directory)
     end
   end
 end
diff --git a/lib/telebugs/middleware/root_directory_filter.rb b/lib/telebugs/middleware/root_directory_filter.rb
new file mode 100644
index 0000000..4711a75
--- /dev/null
+++ b/lib/telebugs/middleware/root_directory_filter.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module Telebugs
+  class Middleware
+    # Filters out the root directory from the backtrace paths.
+    class RootDirectoryFilter < Telebugs::Middleware
+      def initialize(root_directory)
+        @root_directory = root_directory
+      end
+
+      def call(report)
+        report.data[:errors].each do |error|
+          error[:backtrace].each do |frame|
+            next unless (file = frame[:file])
+            next unless file.start_with?(@root_directory)
+
+            file.sub!(/#{@root_directory}\/?/, "")
+          end
+        end
+      end
+
+      def weight
+        -999
+      end
+    end
+  end
+end
diff --git a/test/middleware/test_root_directory_filter.rb b/test/middleware/test_root_directory_filter.rb
new file mode 100644
index 0000000..9533032
--- /dev/null
+++ b/test/middleware/test_root_directory_filter.rb
@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class TestRootDirectoryFilter < Minitest::Test
+  def test_root_directory_filter
+    root_directory = "/tmp"
+    Telebugs.configure do |c|
+      c.root_directory = root_directory
+    end
+
+    e = StandardError.new("test error")
+    e.set_backtrace([
+      "#{root_directory}/app/models/user.rb:1:in `save'"
+    ])
+
+    report = Telebugs::Report.new(e)
+    Telebugs::Middleware::RootDirectoryFilter.new(root_directory).call(report)
+
+    assert_equal "app/models/user.rb", report.data[:errors][0][:backtrace][0][:file]
+  end
+end
diff --git a/test/test_config.rb b/test/test_config.rb
index 62d824c..0577006 100644
--- a/test/test_config.rb
+++ b/test/test_config.rb
@@ -20,9 +20,20 @@ def test_error_api_url
   end
 
   def test_root_directory
-    Telebugs.configure { |c| c.root_directory = "/tmp" }
+    Telebugs.configure { |c| c.root_directory = "/etc" }
 
-    assert_equal "/tmp", Telebugs.config.root_directory
+    assert_equal "/etc", Telebugs.config.root_directory
+  end
+
+  def test_root_directory_overwrite_root_directory_filter_middleware
+    Telebugs.configure do |c|
+      c.middleware.use Telebugs::Middleware::RootDirectoryFilter.new("/tmp")
+      c.root_directory = "/tmp"
+      c.root_directory = "/var"
+      c.root_directory = "/etc"
+    end
+
+    assert_equal 2, Telebugs.config.middleware.middlewares.size
   end
 
   def test_middleware
@@ -32,11 +43,12 @@ def test_middleware
       c.middleware.use middleware_class.new
     end
 
-    assert_equal 2, Telebugs.config.middleware.middlewares.size
+    assert_equal 3, Telebugs.config.middleware.middlewares.size
   end
 
   def test_default_middleware_list
     middleware_list = Telebugs.config.middleware.middlewares.map(&:class)
     assert_includes middleware_list, Telebugs::Middleware::GemRootFilter
+    assert_includes middleware_list, Telebugs::Middleware::RootDirectoryFilter
   end
 end