diff --git a/hub/db/db.py b/hub/db/db.py
index b2a8f59..112328b 100644
--- a/hub/db/db.py
+++ b/hub/db/db.py
@@ -90,9 +90,9 @@ class SecondaryDB:
         self.header_mc = MerkleCache(self.merkle, self.fs_block_hashes)
 
         # lru cache of tx_hash: (tx_bytes, tx_num, position, tx_height)
-        self.tx_cache = LRUCacheWithMetrics(2 ** 16, metric_name='tx', namespace=NAMESPACE)
+        self.tx_cache = LRUCacheWithMetrics(2 ** 15, metric_name='tx', namespace=NAMESPACE)
         # lru cache of block heights to merkle trees of the block tx hashes
-        self.merkle_cache = LRUCacheWithMetrics(2 ** 15, metric_name='merkle', namespace=NAMESPACE)
+        self.merkle_cache = LRUCacheWithMetrics(2 ** 14, metric_name='merkle', namespace=NAMESPACE)
 
         # these are only used if the cache_all_tx_hashes setting is on
         self.total_transactions: List[bytes] = []