diff --git a/src/main/kotlin/org/ethereum/lists/chains/Main.kt b/src/main/kotlin/org/ethereum/lists/chains/Main.kt
index e78b6153..8fb02d59 100644
--- a/src/main/kotlin/org/ethereum/lists/chains/Main.kt
+++ b/src/main/kotlin/org/ethereum/lists/chains/Main.kt
@@ -34,7 +34,7 @@ private fun createOutputFiles() {
 
     allChainFiles
         .map { Klaxon().parseJsonObject(it.reader()) }
-        .sortedBy { (it["chainId"] as Number).toLong()  }
+        .sortedBy { (it["chainId"] as Number).toLong() }
         .forEach { jsonObject ->
             chainJSONArray.add(jsonObject)
 
@@ -215,10 +215,28 @@ fun checkChain(chainFile: File, connectRPC: Boolean) {
             throw ParentMustBeObject()
         }
 
-        if (it.keys != mutableSetOf("chain", "type")) {
+        if (!it.keys.containsAll(setOf("chain", "type"))) {
             throw ParentMustHaveChainAndType()
         }
 
+        val extraFields = it.keys - setOf("chain", "type", "bridges")
+        if (extraFields.isNotEmpty()) {
+            throw ParentHasExtraFields(extraFields)
+        }
+
+        val bridges = it["bridges"]
+        if (bridges != null && bridges !is List<*>) {
+            throw ParentBridgeNoArray()
+        }
+        (bridges as? JsonArray<*>)?.forEach { bridge ->
+            if (bridge !is JsonObject) {
+                throw BridgeNoObject()
+            }
+            if (bridge.keys.size != 1 || bridge.keys.first() != "url") {
+                throw BridgeOnlyURL()
+            }
+        }
+
         if (!setOf("L2", "shard").contains(it["type"])) {
             throw ParentHasInvalidType(it["type"] as? String)
         }
diff --git a/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt b/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
index ac92779d..e4af9a9b 100644
--- a/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
+++ b/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
@@ -19,4 +19,8 @@ class ExplorerStandardMustBeEIP3091: Exception("explorer standard must be EIP309
 class ParentHasInvalidType(type: String?): Exception("Parent has invalid type $type - only L2 or shard allowed")
 class ParentMustBeObject: Exception("parent must be an object")
 class ParentMustHaveChainAndType: Exception("parent must have fields 'chain' and 'type'")
+class ParentHasExtraFields(fields: Set<String>): Exception("parent has extra field: $fields")
+class ParentBridgeNoArray: Exception("parent bridge must be array")
+class BridgeNoObject: Exception("parent bridges must be array consisting of json objects")
+class BridgeOnlyURL: Exception("parent bridge only contain an URL")
 class ParentChainDoesNotExist(chain: String): Exception("Referenced parent chain ($chain) does not exist")
\ No newline at end of file
diff --git a/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt b/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
index d34f090e..ef74c284 100644
--- a/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
+++ b/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
@@ -35,6 +35,20 @@ class TheChainChecker {
         checkChain(file, false)
     }
 
+    @Test
+    fun shouldPassForValidChainWithParentBridge() {
+        val file = getFile("valid/withparentbridge/eip155-2.json")
+
+        checkChain(file, false)
+    }
+
+    @Test(expected = BridgeNoObject::class)
+    fun shouldFailForParentBridgeElementNoObject() {
+        val file = getFile("invalid/withparentextrabridgeelementnoobject/eip155-2.json")
+
+        checkChain(file, false)
+    }
+
     @Test(expected = ParentMustBeObject::class)
     fun shouldFailForParentNoObject() {
         val file = getFile("invalid/withparentnobject/eip155-2.json")
@@ -49,6 +63,33 @@ class TheChainChecker {
         checkChain(file, false)
     }
 
+    @Test(expected = ParentHasExtraFields::class)
+    fun shouldFailForParentWithExtraParentField() {
+        val file = getFile("invalid/withparentextrafield/eip155-2.json")
+
+        checkChain(file, false)
+    }
+
+    @Test(expected = ParentHasExtraFields::class)
+    fun shouldFailForParentWithExtraField() {
+        val file = getFile("invalid/withparentextrafield/eip155-2.json")
+
+        checkChain(file, false)
+    }
+
+    @Test(expected = BridgeOnlyURL::class)
+    fun shouldFailForParentWithExtraBridgesField() {
+        val file = getFile("invalid/withparentextrabridgesfield/eip155-2.json")
+
+        checkChain(file, false)
+    }
+
+    @Test(expected = ParentBridgeNoArray::class)
+    fun shouldFailForParentWithExtraBridgeNoArray() {
+        val file = getFile("invalid/withparentextrabridgesnoarray/eip155-2.json")
+
+        checkChain(file, false)
+    }
 
     @Test(expected = ParentChainDoesNotExist::class)
     fun shouldFailIfParentChainDoesNotExist() {
diff --git a/src/test/resources/test_chains/invalid/withparentextrabridgeelementnoobject/eip155-2.json b/src/test/resources/test_chains/invalid/withparentextrabridgeelementnoobject/eip155-2.json
new file mode 100644
index 00000000..7cc1fd47
--- /dev/null
+++ b/src/test/resources/test_chains/invalid/withparentextrabridgeelementnoobject/eip155-2.json
@@ -0,0 +1,24 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 2,
+  "networkId": 2,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "parent": {
+    "chain": "eip155-1",
+    "type": "L2",
+    "bridges":  ["yolo"]
+  }
+}
diff --git a/src/test/resources/test_chains/invalid/withparentextrabridgesfield/eip155-2.json b/src/test/resources/test_chains/invalid/withparentextrabridgesfield/eip155-2.json
new file mode 100644
index 00000000..e4007b5e
--- /dev/null
+++ b/src/test/resources/test_chains/invalid/withparentextrabridgesfield/eip155-2.json
@@ -0,0 +1,24 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 2,
+  "networkId": 2,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "parent": {
+    "chain": "eip155-1",
+    "type": "L2",
+    "bridges":  [{"yolo":"yoooo"}]
+  }
+}
diff --git a/src/test/resources/test_chains/invalid/withparentextrabridgesnoarray/eip155-2.json b/src/test/resources/test_chains/invalid/withparentextrabridgesnoarray/eip155-2.json
new file mode 100644
index 00000000..8fa85245
--- /dev/null
+++ b/src/test/resources/test_chains/invalid/withparentextrabridgesnoarray/eip155-2.json
@@ -0,0 +1,24 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 2,
+  "networkId": 2,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "parent": {
+    "chain": "eip155-1",
+    "type": "L2",
+    "bridges":  "yolo"
+  }
+}
diff --git a/src/test/resources/test_chains/invalid/withparentextrafield/eip155-2.json b/src/test/resources/test_chains/invalid/withparentextrafield/eip155-2.json
new file mode 100644
index 00000000..0be4e23e
--- /dev/null
+++ b/src/test/resources/test_chains/invalid/withparentextrafield/eip155-2.json
@@ -0,0 +1,24 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 2,
+  "networkId": 2,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "parent": {
+    "chain": "eip155-1",
+    "type": "L2",
+    "yolo": "yooooo"
+  }
+}
diff --git a/src/test/resources/test_chains/valid/withparentbridge/eip155-1.json b/src/test/resources/test_chains/valid/withparentbridge/eip155-1.json
new file mode 100644
index 00000000..457f8964
--- /dev/null
+++ b/src/test/resources/test_chains/valid/withparentbridge/eip155-1.json
@@ -0,0 +1,19 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 1,
+  "networkId": 1,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  }
+}
diff --git a/src/test/resources/test_chains/valid/withparentbridge/eip155-2.json b/src/test/resources/test_chains/valid/withparentbridge/eip155-2.json
new file mode 100644
index 00000000..e6aef8e4
--- /dev/null
+++ b/src/test/resources/test_chains/valid/withparentbridge/eip155-2.json
@@ -0,0 +1,26 @@
+{
+  "name": "Ethereum Mainnet",
+  "shortName": "eth",
+  "chain": "ETH",
+  "network": "mainnet",
+  "chainId": 2,
+  "networkId": 2,
+  "rpc": [
+    "https://mainnet.infura.io/v3/${INFURA_API_KEY}",
+    "https://api.mycryptoapi.com/eth"
+  ],
+  "faucets": [],
+  "infoURL": "https://ethereum.org",
+  "nativeCurrency": {
+    "name": "Ether",
+    "symbol": "ETH",
+    "decimals": 18
+  },
+  "parent": {
+    "chain": "eip155-1",
+    "type": "L2",
+    "bridges": [
+      {"url": "https://bridge.foo.org"}
+    ]
+  }
+}