diff --git a/procrunner/__init__.py b/procrunner/__init__.py
index 62cfb5d..8cf50dc 100644
--- a/procrunner/__init__.py
+++ b/procrunner/__init__.py
@@ -280,7 +280,8 @@
 
 def run(command, timeout=None, debug=False, stdin=None, print_stdout=True,
         print_stderr=True, callback_stdout=None, callback_stderr=None,
-        environment=None, environment_override=None, win32resolve=True):
+        environment=None, environment_override=None, win32resolve=True,
+        working_directory=None):
   '''Run an external process.
 
      :param array command: Command line to be run, specified as array.
@@ -296,9 +297,12 @@
      :param dict environment: The full execution environment for the command.
      :param dict environment_override: Change environment variables from the
                                        current values for command execution.
-     :param win32resolve: If on Windows, find the appropriate executable first.
-                          This allows running of .bat, .cmd, etc. files without
-                          explicitly specifying their extension.
+     :param boolean win32resolve: If on Windows, find the appropriate executable
+                                  first. This allows running of .bat, .cmd, etc.
+                                  files without explicitly specifying their
+                                  extension.
+     :param string working_directory: If specified, run the executable from
+                                      within this working directory.
      :return: A dictionary containing stdout, stderr (both as bytestrings),
               runtime, exitcode, and more.
   '''
@@ -327,7 +331,8 @@
   if win32resolve and sys.platform == 'win32':
     command = _windows_resolve(command)
 
-  p = subprocess.Popen(command, shell=False, stdin=stdin_pipe, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env)
+  p = subprocess.Popen(command, shell=False, cwd=working_directory, env=env,
+      stdin=stdin_pipe, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
 
   thread_pipe_pool = []
   notifyee, notifier = Pipe(False)
diff --git a/tests/test_procrunner.py b/tests/test_procrunner.py
index ee390ef..f2bc299 100644
--- a/tests/test_procrunner.py
+++ b/tests/test_procrunner.py
@@ -51,14 +51,16 @@
     'runtime': mock.ANY,
     'timeout': False,
     'time_start': mock.ANY,
-    'time_end': mock.ANY
+    'time_end': mock.ANY,
   }
 
   actual = procrunner.run(command, 0.5, False,
-               callback_stdout=mock.sentinel.callback_stdout, callback_stderr=mock.sentinel.callback_stderr)
+               callback_stdout=mock.sentinel.callback_stdout, callback_stderr=mock.sentinel.callback_stderr,
+               working_directory=mock.sentinel.cwd)
 
   assert mock_subprocess.Popen.called
   assert mock_subprocess.Popen.call_args[1]['env'] == os.environ
+  assert mock_subprocess.Popen.call_args[1]['cwd'] == mock.sentinel.cwd
   mock_streamreader.assert_has_calls([mock.call(stream_stdout, output=mock.ANY, debug=mock.ANY, notify=mock.ANY, callback=mock.sentinel.callback_stdout),
                                       mock.call(stream_stderr, output=mock.ANY, debug=mock.ANY, notify=mock.ANY, callback=mock.sentinel.callback_stderr)],
                                      any_order=True)