diff --git a/git-status-all b/git-status-all
index f863d22..fc17fd2 100755
--- a/git-status-all
+++ b/git-status-all
@@ -4,13 +4,14 @@
 from __future__ import division, print_function
 
 from colorama import Fore
+from pathlib import Path
 
 import contextlib
 import os
 import subprocess
 
 
-def git_directories(startdir):
+def git_directories(startdir) -> Path:
     for dirpath, dirnames, _ in os.walk(startdir):
         if '.sync' in dirpath:
             continue
@@ -18,11 +19,11 @@ def git_directories(startdir):
             # FIXME
             continue
         if set(['info', 'objects', 'refs']).issubset(set(dirnames)):
-            yield dirpath
+            yield Path(dirpath)
 
 
 @contextlib.contextmanager
-def working_directory(directory):
+def working_directory(directory: Path):
     saved_cwd = os.getcwd()
     os.chdir(directory)
     yield
@@ -30,7 +31,12 @@ def working_directory(directory):
 
 
 for git_directory in git_directories('.'):
-    work_tree_directory = git_directory[:-4]
+    # technically,we could have a different GIT_DIR than ".git", but this script
+    # assumes ".git".
+    if git_directory.parts[-1] != ".git":
+        continue
+    work_tree_directory = git_directory.parent
+
     with working_directory(work_tree_directory):
         try:
             out = subprocess.check_output(['git', 'status', '-s'], stderr=subprocess.STDOUT)