diff --git a/substrate/primitives/core/src/crypto.rs b/substrate/primitives/core/src/crypto.rs
index 4764a0cac1b140e909ffb2707f1d259b4f84fb9e..cf7be5f2166e80f387bf3b9efcf5daece279f661 100644
--- a/substrate/primitives/core/src/crypto.rs
+++ b/substrate/primitives/core/src/crypto.rs
@@ -597,6 +597,8 @@ ss58_address_format!(
 		(77, "manta", "Manta Network, standard account (*25519).")
 	CalamariAccount =>
 		(78, "calamari", "Manta Canary Network, standard account (*25519).")
+	Polkadex =>
+		(88, "polkadex", "Polkadex Mainnet, standard account (*25519).")
 	PolkaSmith =>
 		(98, "polkasmith", "PolkaSmith Canary Network, standard account (*25519).")
 	PolkaFoundry =>
diff --git a/substrate/ss58-registry.json b/substrate/ss58-registry.json
index 563cc248db9dde61618e7198e770ed68c3d200a8..7c95f421586a42b20178da714b51329cded646ff 100644
--- a/substrate/ss58-registry.json
+++ b/substrate/ss58-registry.json
@@ -532,6 +532,15 @@
 			"standardAccount": "*25519",
 			"website": "https://manta.network"
 		},
+		{
+			"prefix": 88,
+			"network": "polkadex",
+			"displayName": "Polkadex Mainnet",
+			"symbols": ["PDEX"],
+			"decimals": [12],
+			"standardAccount": "*25519",
+			"website": "https://polkadex.trade"
+		},
 		{
 			"prefix": 98,
 			"network": "polkasmith",