diff --git a/patchport.py b/patchport.py
index f32cfbf5..c4be5e47 100644
--- a/patchport.py
+++ b/patchport.py
@@ -96,7 +96,7 @@ re_versionname_yml = re.compile(r'versionName: \'?(.+?)\'?$')
 
 re_releasedate = re.compile(r'released on ([0-9]{4}-[0-9]{2}-[0-9]{2})')
 re_crashlytics = re.compile(r'com\.crashlytics\.android\.build_id">([a-z0-9]'
-                            r'{8}-[a-z0-9]{4}-[a-z0-9]{4}-[a-z0-9]{4}-'
+                            r'{8}-?[a-z0-9]{4}-?[a-z0-9]{4}-?[a-z0-9]{4}-?'
                             r'[a-z0-9]{12})</string>')