diff --git a/src/cli/args.rs b/src/cli/args.rs
index 5795cab..f40e60d 100644
--- a/src/cli/args.rs
+++ b/src/cli/args.rs
@@ -136,17 +136,18 @@ impl<C: Clone + Eq + Debug + Subcommand, O: DescriptorOpts> Args<C, O> {
             };
 
         if sync {
+            let network = self.general.network.to_string();
             let indexer =
                 match (&self.resolver.esplora, &self.resolver.electrum, &self.resolver.mempool) {
-                    (None, Some(url), None) => {
-                        AnyIndexer::Electrum(Box::new(electrum::Client::new(url)?))
-                    }
-                    (Some(url), None, None) => {
-                        AnyIndexer::Esplora(Box::new(IndexerClient::new_esplora(url)?))
-                    }
-                    (None, None, Some(url)) => {
-                        AnyIndexer::Mempool(Box::new(IndexerClient::new_mempool(url)?))
-                    }
+                    (None, Some(url), None) => AnyIndexer::Electrum(Box::new(
+                        electrum::Client::new(&url.replace("{network}", &network))?,
+                    )),
+                    (Some(url), None, None) => AnyIndexer::Esplora(Box::new(
+                        IndexerClient::new_esplora(&url.replace("{network}", &network))?,
+                    )),
+                    (None, None, Some(url)) => AnyIndexer::Mempool(Box::new(
+                        IndexerClient::new_mempool(&url.replace("{network}", &network))?,
+                    )),
                     _ => {
                         eprintln!(
                             " - error: no blockchain indexer specified; use either --esplora \
diff --git a/src/cli/opts.rs b/src/cli/opts.rs
index 7afa7b1..3eb14ce 100644
--- a/src/cli/opts.rs
+++ b/src/cli/opts.rs
@@ -43,8 +43,8 @@ pub const DATA_DIR: &str = "~/Documents";
 pub const DATA_DIR: &str = ".";
 
 pub const DEFAULT_ELECTRUM: &str = "example.com:50001";
-pub const DEFAULT_ESPLORA: &str = "https://blockstream.info/testnet/api";
-pub const DEFAULT_MEMPOOL: &str = "https://mempool.space/testnet/api";
+pub const DEFAULT_ESPLORA: &str = "https://blockstream.info/{network}/api";
+pub const DEFAULT_MEMPOOL: &str = "https://mempool.space/{network}/api";
 
 #[derive(Args, Clone, PartialEq, Eq, Debug)]
 #[group(args = ["electrum", "esplora", "mempool"])]