diff --git a/core/aimedb.py b/core/aimedb.py
index 56490c5..88796c7 100644
--- a/core/aimedb.py
+++ b/core/aimedb.py
@@ -240,18 +240,19 @@ class AimedbServlette():
         used on the big boy networks.
         """
         req = ADBFelicaLookupRequest(data)
-        card = await self.data.card.get_card_by_idm(req.idm)
+        idm = req.idm.zfill(16)
+        card = await self.data.card.get_card_by_idm(idm)
         if not card:
-            ac = self.data.card.to_access_code(req.idm)
+            ac = self.data.card.to_access_code(idm)
             test = await self.data.card.get_card_by_access_code(ac)
             if test:
-                await self.data.card.set_idm_by_access_code(ac, req.idm)
+                await self.data.card.set_idm_by_access_code(ac, idm)
         
         else:
             ac = card['access_code']
         
         self.logger.info(
-            f"idm {req.idm} ipm {req.pmm} -> access_code {ac}"
+            f"idm {idm} ipm {req.pmm.zfill(16)} -> access_code {ac}"
         )
         return ADBFelicaLookupResponse.from_req(req.head, ac)
 
@@ -293,13 +294,14 @@ class AimedbServlette():
     async def handle_felica_lookup_ex(self, data: bytes, resp_code: int) -> bytes:
         req = ADBFelicaLookup2Request(data)
         user_id = None
-        card = await self.data.card.get_card_by_idm(req.idm)
+        idm = req.idm.zfill(16)
+        card = await self.data.card.get_card_by_idm(idm)
         if not card:
-            access_code = self.data.card.to_access_code(req.idm)
+            access_code = self.data.card.to_access_code(idm)
             card = await self.data.card.get_card_by_access_code(access_code)
             if card:
                 user_id = card['user']
-                await self.data.card.set_idm_by_access_code(access_code, req.idm)
+                await self.data.card.set_idm_by_access_code(access_code, idm)
         
         else:
             user_id = card['user']
@@ -309,7 +311,7 @@ class AimedbServlette():
             user_id = -1
 
         self.logger.info(
-            f"idm {req.idm} ipm {req.pmm} -> access_code {access_code} user_id {user_id}"
+            f"idm {idm} ipm {req.pmm} -> access_code {access_code} user_id {user_id}"
         )
 
         resp = ADBFelicaLookup2Response.from_req(req.head, user_id, access_code)