diff --git a/isign/archive.py b/isign/archive.py
index 12823768..5d9792fe 100644
--- a/isign/archive.py
+++ b/isign/archive.py
@@ -125,7 +125,7 @@ def precheck(self):
 
     def unarchive_to_temp(self):
         containing_dir = make_temp_dir()
-        call([get_helper('unzip'), "-qu", self.path, "-d", containing_dir])
+        call([get_helper('unzip'), "-O", "UTF-8", "-qu", self.path, "-d", containing_dir])
         app_dir = abspath(os.path.join(containing_dir, self.relative_app_dir))
         return containing_dir, App(app_dir)
 
diff --git a/isign/code_resources.py b/isign/code_resources.py
index 65267cf9..b181adc1 100644
--- a/isign/code_resources.py
+++ b/isign/code_resources.py
@@ -147,9 +147,9 @@ def scan(self):
                     val['optional'] = True
 
                 if len(val) == 1 and 'hash' in val:
-                    file_entries[relative_path] = val['hash']
+                    file_entries[relative_path.decode("utf-8")] = val['hash']
                 else:
-                    file_entries[relative_path] = val
+                    file_entries[relative_path.decode("utf-8")] = val
 
             for dirname in dirs:
                 rule, path, relative_path = self.get_rule_and_paths(root,