diff --git a/chainqueue/cache/base.py b/chainqueue/cache/base.py
index d5a7813..d94fe0f 100644
--- a/chainqueue/cache/base.py
+++ b/chainqueue/cache/base.py
@@ -16,13 +16,12 @@ class NoopNormalizer:
     def noop(self, v):
         return v
 
-
 noop_normalizer = NoopNormalizer()
 
 
 class CacheTx:
 
-    def __init__(self, normalizer=noop_normalizer):
+    def __init__(self, chain_spec, normalizer=noop_normalizer):
         self.normalizer = normalizer
         self.sender = None
         self.recipient = None
@@ -34,6 +33,8 @@ class CacheTx:
         self.tx_index = None
         self.timestamp = None
 
+        self.chain_spec = chain_spec
+
 
     def confirm(self, block_number, tx_index, timestamp):
         self.block_number = block_number
@@ -65,8 +66,8 @@ class CacheTx:
 
 class CacheTokenTx(CacheTx):
 
-    def __init__(self, normalizer=noop_normalizer):
-        super(CacheTokenTx, self).__init__(normalizer=normalizer)
+    def __init__(self, chain_spec, normalizer=noop_normalizer):
+        super(CacheTokenTx, self).__init__(chain_spec, normalizer=normalizer)
         self.v_src_token = None
         self.v_src_value = None
         self.v_dst_token = None
diff --git a/chainqueue/store/base.py b/chainqueue/store/base.py
index 3880605..f281351 100644
--- a/chainqueue/store/base.py
+++ b/chainqueue/store/base.py
@@ -42,7 +42,7 @@ class Store:
 
 
     def put(self, v, cache_adapter=CacheTx):
-        tx = cache_adapter()
+        tx = cache_adapter(self.chain_spec)
         tx.deserialize(v)
         k = tx.hash
         n = self.counter.next()
diff --git a/tests/test_cache.py b/tests/test_cache.py
index 4c7217a..78bff99 100644
--- a/tests/test_cache.py
+++ b/tests/test_cache.py
@@ -52,7 +52,7 @@ class TestCache(TestShepBase):
     def test_cache_instance(self):
         normalizer = MockNormalizer()
         a = b'foo'
-        tx = MockCacheTokenTx(normalizer=normalizer)
+        tx = MockCacheTokenTx(self.chain_spec, normalizer=normalizer)
         tx.deserialize(a)
         self.assertTrue(isinstance(tx.value, float))
         self.assertEqual(tx.sender[:4], 'addr')
@@ -62,7 +62,7 @@ class TestCache(TestShepBase):
 
     def test_cache_putget(self):
         a = b'foo'
-        tx = MockCacheTokenTx()
+        tx = MockCacheTokenTx(self.chain_spec)
         tx.deserialize(a)
         self.cache.put(self.chain_spec, tx)
         tx_retrieved = self.cache.get(self.chain_spec, tx.hash)