diff --git a/indexer/configs/cardano_node.yml b/indexer/configs/cardano_node.yml
index b39261bb..071b6bbe 100644
--- a/indexer/configs/cardano_node.yml
+++ b/indexer/configs/cardano_node.yml
@@ -1,10 +1,10 @@
 source:
   type: cardano_net
   relay: 
-    - relays-new.cardano-mainnet.iohk.io
-    - 3001
-      # - preview-node.world.dev.cardano.org
-      # - 30002
+#    - relays-new.cardano-mainnet.iohk.io
+#    - 3001
+    - preview-node.world.dev.cardano.org
+    - 30002
       # - preprod-node.world.dev.cardano.org
       # - 30000
 
@@ -12,7 +12,7 @@ sink:
   type: cardano
   db:
     type: postgres
-    database_url: postgresql://carp:1234@localhost:5432/carp_mainnet
-  network: mainnet # preview / preprod / testnet
+    database_url: postgresql://postgres:1234@localhost:5432/postgres
+  network: preview # preview / preprod / testnet
 
 start_block:
diff --git a/indexer/tasks/src/multiera/dex/minswap_v1.rs b/indexer/tasks/src/multiera/dex/minswap_v1.rs
index 3da6e031..c4fc42ff 100644
--- a/indexer/tasks/src/multiera/dex/minswap_v1.rs
+++ b/indexer/tasks/src/multiera/dex/minswap_v1.rs
@@ -144,7 +144,7 @@ impl Dex for MinSwapV1 {
                 let target_asset = build_asset(parse_asset_item(0, 0)?, parse_asset_item(0, 1)?);
 
                 // Get transaction output
-                let output_address_items = vec![
+                let output_address_items = [
                     String::from("01"), // mainnet
                     input_datum["fields"][1]["fields"][0]["fields"][0]["bytes"]
                         .as_str()
diff --git a/indexer/tasks/src/multiera/dex/sundaeswap_v1.rs b/indexer/tasks/src/multiera/dex/sundaeswap_v1.rs
index 1d9ae941..b14bb4b5 100644
--- a/indexer/tasks/src/multiera/dex/sundaeswap_v1.rs
+++ b/indexer/tasks/src/multiera/dex/sundaeswap_v1.rs
@@ -134,7 +134,7 @@ impl Dex for SundaeSwapV1 {
                 }
 
                 // Get transaction output
-                let output_address_items = vec![
+                let output_address_items = [
                     String::from("01"), // mainnet
                     input_datum["fields"][1]["fields"][0]["fields"][0]["fields"][0]["fields"][0]
                         ["bytes"]