diff --git a/docs/04-upstream-config.adoc b/docs/04-upstream-config.adoc
index 782acfb8..b700a1f9 100644
--- a/docs/04-upstream-config.adoc
+++ b/docs/04-upstream-config.adoc
@@ -130,6 +130,7 @@ Currently, dshackle supports next chains (should be used as chain names in confi
 - ethereum (eth)
 - ethereum-classic (etc)
 - polygon (matic)
+- polygon-mumbai
 - arbitrum (arb)
 - arbitrum-testnet
 - arbitrum-nova
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/BlockchainType.kt b/src/main/kotlin/io/emeraldpay/dshackle/BlockchainType.kt
index 3c26c0ee..450c8ba9 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/BlockchainType.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/BlockchainType.kt
@@ -20,7 +20,8 @@ enum class BlockchainType {
                 chain == Chain.POLYGON_ZKEVM ||
                 chain == Chain.TESTNET_POLYGON_ZKEVM ||
                 chain == Chain.ZKSYNC ||
-                chain == Chain.TESTNET_ZKSYNC
+                chain == Chain.TESTNET_ZKSYNC ||
+                chain == Chain.TESTNET_POYGON_POS_MUMBAI
             ) {
                 return EVM_POS
             }
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/Chain.kt b/src/main/kotlin/io/emeraldpay/dshackle/Chain.kt
index ff05e555..b918fc3a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/Chain.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/Chain.kt
@@ -79,6 +79,11 @@ enum class Chain(val id: Int, val chainCode: String, val chainName: String) {
         10012,
         "ZKS_TESTNET",
         "ZkSync Testnet"
+    ),
+    TESTNET_POYGON_POS_MUMBAI(
+        10013,
+        "POLYGON_POS_MUMBAI",
+        "Polygon POS Mumbai Testnet"
     );
 
     companion object {
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
index 62981366..7ee41e9c 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/Global.kt
@@ -76,6 +76,7 @@ class Global {
             "polygon-zkevm-testnet" to Chain.TESTNET_POLYGON_ZKEVM,
             "zksync" to Chain.ZKSYNC,
             "zksync-testnet" to Chain.TESTNET_ZKSYNC,
+            "polygon-mumbai" to Chain.TESTNET_POYGON_POS_MUMBAI,
         )
 
         fun chainById(id: String?): Chain {
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethods.kt b/src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethods.kt
index e3b71edf..a3c7e38e 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethods.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/upstream/calls/DefaultEthereumMethods.kt
@@ -175,7 +175,7 @@ class DefaultEthereumMethods(
             Chain.OPTIMISM, Chain.TESTNET_OPTIMISM -> listOf(
                 "rollup_gasPrices"
             )
-            Chain.POLYGON -> listOf(
+            Chain.POLYGON, Chain.TESTNET_POYGON_POS_MUMBAI -> listOf(
                 "bor_getAuthor",
                 "bor_getCurrentValidators",
                 "bor_getCurrentProposer",
@@ -311,6 +311,10 @@ class DefaultEthereumMethods(
                         "\"280\""
                     }
 
+                    Chain.TESTNET_POYGON_POS_MUMBAI == chain -> {
+                        "\"80001\""
+                    }
+
                     else -> throw RpcException(-32602, "Invalid chain")
                 }
             }
@@ -389,6 +393,10 @@ class DefaultEthereumMethods(
                         "\"0x118\""
                     }
 
+                    Chain.TESTNET_POYGON_POS_MUMBAI == chain -> {
+                        "\"0x13881\""
+                    }
+
                     else -> throw RpcException(-32602, "Invalid chain")
                 }
             }
diff --git a/src/main/resources/chains.yaml b/src/main/resources/chains.yaml
index 36a3400f..2789e275 100644
--- a/src/main/resources/chains.yaml
+++ b/src/main/resources/chains.yaml
@@ -14,6 +14,10 @@ chain-settings:
       lags:
         syncing: 20
         lagging: 10
+    - id: polygon-mumbai
+      lags:
+        syncing: 20
+        lagging: 10
     - id: arbitrum
       options:
         validate-peers: false