diff --git a/indexer/Cargo.toml b/indexer/Cargo.toml
index 049cd77b..45dbb979 100644
--- a/indexer/Cargo.toml
+++ b/indexer/Cargo.toml
@@ -9,10 +9,12 @@ strip = true
 
 [dependencies]
 # [core]
-dcspark-core = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "572af17e3e22101dee64e0999049a571aea26e0f" }
-dcspark-blockchain-source = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "572af17e3e22101dee64e0999049a571aea26e0f" }
-multiverse = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "572af17e3e22101dee64e0999049a571aea26e0f" }
-
+dcspark-core = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "98c21b8d6c4f72a1c1813eaec3b9ccf1ff67106e" }
+dcspark-blockchain-source = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "98c21b8d6c4f72a1c1813eaec3b9ccf1ff67106e" }
+#dcspark-core = { path = "../../dcspark-core/core" }
+#dcspark-blockchain-source = { path = "../../dcspark-core/blockchain-source" }
+#multiverse = { path = "../../dcspark-core/multiverse" }
+multiverse = { git = "https://github.com/dcSpark/dcspark-core.git", rev = "98c21b8d6c4f72a1c1813eaec3b9ccf1ff67106e" }
 # [local]
 entity = { path = "entity" }
 migration = { path = "migration" }
diff --git a/indexer/configs/custom.yml b/indexer/configs/custom.yml
new file mode 100644
index 00000000..9ab0870f
--- /dev/null
+++ b/indexer/configs/custom.yml
@@ -0,0 +1,38 @@
+source:
+  type: cardano_net
+  relay:
+    - localhost
+    - 3001
+
+sink:
+  type: cardano
+  db:
+    type: postgres
+    database_url: postgresql://carp:1234@localhost:5432/carp_custom5
+  network: custom # preview / preprod / testnet / custom
+  genesis_folder: /home/user/Cardano/carp/indexer/genesis/
+  custom_config:
+    chain_info:
+      network_id: 1
+      protocol_magic: 42
+    relay:
+      - "localhost"
+      - 3001
+    from:
+      BlockHeader:
+        slot_nb: 1
+        hash: "ba8066f73eb9cf4ad9adf38051c54d3a51d92cb98561cffc1f202b1b97739cd5"
+    genesis_parent: "0ded594a3411f6d3236228abc1e2ef8c2a21e09d859ea23bfc2182f92853cba8"
+    genesis:
+      BlockHeader:
+        slot_nb: 0
+        hash: "7a32184d9e0068b0fa75fd0ecaad798f9bc573d4921c519b12968e26ff0747a3"
+    shelley_era_config:
+      first_slot: 0
+      start_epoch: 0
+      known_time: 1722355346
+      slot_length: 1
+      epoch_length_seconds: 500
+
+start_block:
+
diff --git a/indexer/src/main.rs b/indexer/src/main.rs
index a9b12f2f..3e6f444d 100644
--- a/indexer/src/main.rs
+++ b/indexer/src/main.rs
@@ -55,6 +55,8 @@ pub enum SinkConfig {
     Cardano {
         db: DbConfig,
         network: String,
+        /// Custom configuration. If not present it will be inferred from the network name
+        custom_config: Option<dcspark_blockchain_source::cardano::NetworkConfiguration>,
         genesis_folder: Option<String>,
     },
 }
@@ -158,10 +160,20 @@ async fn main() -> anyhow::Result<()> {
         config
     };
 
-    let (network, mut sink) = match config.sink {
-        SinkConfig::Cardano { ref network, .. } => (
+    let (network, base_config, mut sink) = match &config.sink {
+        SinkConfig::Cardano { network, custom_config, .. } => (
             network.clone(),
-            CardanoSink::new(config.sink, exec_plan)
+            match custom_config {
+                Some(custom_config) => custom_config.clone(),
+                None => match network.as_ref() {
+                    "mainnet" => dcspark_blockchain_source::cardano::NetworkConfiguration::mainnet(),
+                    "preprod" => dcspark_blockchain_source::cardano::NetworkConfiguration::preprod(),
+                    "preview" => dcspark_blockchain_source::cardano::NetworkConfiguration::preview(),
+                    "custom" => panic!("sink.custom_config is mandatory when setting network to custom"),
+                    unknown_network => return Err(anyhow::anyhow!("network {unknown_network} not supported by source")),
+                }
+            },
+            CardanoSink::new(config.sink.clone(), exec_plan)
                 .await
                 .context("Can't create cardano sink")?,
         ),
@@ -184,40 +196,6 @@ async fn main() -> anyhow::Result<()> {
             main_loop(source, sink, start_from, running, processing_finished).await
         }
         SourceConfig::CardanoNet { relay } => {
-            let base_config = match network.as_ref() {
-                "mainnet" => dcspark_blockchain_source::cardano::NetworkConfiguration::mainnet(),
-                "preprod" => dcspark_blockchain_source::cardano::NetworkConfiguration::preprod(),
-                "preview" => dcspark_blockchain_source::cardano::NetworkConfiguration::preview(),
-                "custom" => dcspark_blockchain_source::cardano::NetworkConfiguration {
-                    // TODO: dynamically fill in all of this
-                    chain_info: dcspark_blockchain_source::cardano::ChainInfo::Custom {
-                        protocol_magic: 0,
-                        network_id: 0,
-                    },
-                    relay: (Cow::Borrowed("preprod-node.world.dev.cardano.org."), 30000),
-                    from: dcspark_blockchain_source::cardano::Point::BlockHeader {
-                        slot_nb: dcspark_core::SlotNumber::new(86400),
-                        hash: dcspark_core::BlockId::new(
-                            "c4a1595c5cc7a31eda9e544986fe9387af4e3491afe0ca9a80714f01951bbd5c",
-                        ),
-                    },
-                    genesis_parent: dcspark_core::BlockId::new(
-                        "d4b8de7a11d929a323373cbab6c1a9bdc931beffff11db111cf9d57356ee1937",
-                    ),
-                    genesis: dcspark_core::BlockId::new(
-                        "9ad7ff320c9cf74e0f5ee78d22a85ce42bb0a487d0506bf60cfb5a91ea4497d2",
-                    ),
-                    shelley_era_config: dcspark_blockchain_source::cardano::time::Era {
-                        first_slot: 4492800,
-                        start_epoch: 208,
-                        known_time: 1596059091,
-                        slot_length: 1,
-                        epoch_length_seconds: 432000,
-                    },
-                },
-                _ => return Err(anyhow::anyhow!("network not supported by source")),
-            };
-
             // try to find a confirmed point.
             //
             // this way the multiverse can be temporary, which saves setting up the extra db
diff --git a/indexer/src/sinks/cardano.rs b/indexer/src/sinks/cardano.rs
index 31689c0a..cbffbe39 100644
--- a/indexer/src/sinks/cardano.rs
+++ b/indexer/src/sinks/cardano.rs
@@ -44,6 +44,7 @@ impl CardanoSink {
             SinkConfig::Cardano {
                 db,
                 network,
+                custom_config: _,
                 genesis_folder,
             } => (db, network, genesis_folder),
             _ => todo!("Invalid sink config provided"),