diff --git a/doorUpdater.py b/doorUpdater.py
index 0e8e15a..cf318a6 100755
--- a/doorUpdater.py
+++ b/doorUpdater.py
@@ -56,14 +56,7 @@ def getMembershipworksData():
         print(r.text)
         sys.exit(1)
 
-    newHash = md5(bytes(r.text, 'utf8')).hexdigest()
-    if os.path.exists('/tmp/doorUpdaterLastHash'):
-        with open('/tmp/doorUpdaterLastHash', 'r') as f:
-            if newHash == f.read():
-                print("hashes are the same, not updating")
-                sys.exit(0)
-
-    return r.text, newHash
+    return r.text
 
 def makeMember(member, doorAuth):
     """Create an output CSV row for the member"""
@@ -92,7 +85,7 @@ def makeMember(member, doorAuth):
 
     return out
 
-def makeDoor(doorName, doorData, members):
+def makeDoor(doorName, doorData, members, prevHash):
     """Create a CSV for the given door"""
     outString = StringIO()
     writer = csv.DictWriter(outString, fieldnames)
@@ -105,21 +98,33 @@ def makeDoor(doorName, doorData, members):
     print(outString.getvalue())
 
     outString.seek(0)
-    doCSVImport(doorData["ip"], outString)
-    pass
+    doorHash = md5(bytes(outString.getvalue(), 'utf8')).hexdigest()
+    if doorHash == prevHash:
+        print("Door", doorName, "not changed, not updating")
+    else:
+        doCSVImport(doorData["ip"], outString)
+
+    return doorHash
 
 def main():
-    data, newHash = getMembershipworksData()
+    data = getMembershipworksData()
     reader = csv.DictReader(StringIO(data))
     members = list(reader)
 
+    if os.path.exists('/tmp/doorUpdaterLastHash'):
+        with open('/tmp/doorUpdaterLastHash', 'r') as f:
+            hashes = json.load(f)
+    else:
+        hashes = {}
+
     for doorName, doorData in config["doors"].items():
         print(doorName, doorData)
-        makeDoor(doorName, doorData, members)
+        hashes[doorName] = makeDoor(doorName, doorData, members,
+                                    hashes.get(doorName, ""))
 
     # write out hash if we sucessfully got here
     with open('/tmp/doorUpdaterLastHash', 'w') as f:
-        f.write(newHash)
+        json.dump(hashes, f)
 
 if __name__ == '__main__':
     main()