diff --git a/beacon_chain/eth1/eth1_monitor.nim b/beacon_chain/eth1/eth1_monitor.nim
index af0d06b7b7..07428f0ce7 100644
--- a/beacon_chain/eth1/eth1_monitor.nim
+++ b/beacon_chain/eth1/eth1_monitor.nim
@@ -262,14 +262,6 @@ template finalizedDepositsMerkleizer(m: Eth1Monitor): auto =
 
 proc fixupWeb3Urls*(web3Url: var string) =
   var normalizedUrl = toLowerAscii(web3Url)
-  # TODO https://github.com/status-im/nimbus-eth2/issues/3521
-  if  normalizedUrl.startsWith("https://") or
-      normalizedUrl.startsWith("http://"):
-    fatal "Web3 HTTP URLs not supported; use ws:// Web3 URLs",
-      normalizedUrl,
-      web3Url
-    quit 1
-
   if not (normalizedUrl.startsWith("https://") or
           normalizedUrl.startsWith("http://") or
           normalizedUrl.startsWith("wss://") or
diff --git a/tests/test_eth1_monitor.nim b/tests/test_eth1_monitor.nim
index 7f52c516af..686c4f2c10 100644
--- a/tests/test_eth1_monitor.nim
+++ b/tests/test_eth1_monitor.nim
@@ -10,6 +10,45 @@ import
   ./testutil
 
 suite "Eth1 monitor":
+  test "Rewrite HTTPS Infura URLs":
+    var
+      mainnetWssUrl = "wss://mainnet.infura.io/ws/v3/6224f3c792cc443fafb64e70a98f871e"
+      mainnetHttpUrl = "http://mainnet.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      mainnetHttpsUrl = "https://mainnet.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      goerliWssUrl = "wss://goerli.infura.io/ws/v3/6224f3c792cc443fafb64e70a98f871e"
+      goerliHttpUrl = "http://goerli.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      goerliHttpsUrl = "https://goerli.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      gethHttpUrl = "http://localhost:8545"
+      gethHttpsUrl = "https://localhost:8545"
+      gethWsUrl = "ws://localhost:8545"
+      unspecifiedProtocolUrl = "localhost:8545"
+
+    fixupWeb3Urls mainnetWssUrl
+    fixupWeb3Urls mainnetHttpUrl
+    fixupWeb3Urls mainnetHttpsUrl
+    fixupWeb3Urls goerliWssUrl
+    fixupWeb3Urls goerliHttpUrl
+    fixupWeb3Urls goerliHttpsUrl
+    fixupWeb3Urls gethHttpUrl
+    fixupWeb3Urls gethHttpsUrl
+    fixupWeb3Urls gethWsUrl
+    fixupWeb3Urls unspecifiedProtocolUrl
+
+    check:
+      mainnetWssUrl == "wss://mainnet.infura.io/ws/v3/6224f3c792cc443fafb64e70a98f871e"
+      mainnetHttpUrl == "http://mainnet.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      mainnetHttpsUrl == "https://mainnet.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+
+      goerliWssUrl == "wss://goerli.infura.io/ws/v3/6224f3c792cc443fafb64e70a98f871e"
+      goerliHttpUrl == "http://goerli.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+      goerliHttpsUrl == "https://goerli.infura.io/v3/6224f3c792cc443fafb64e70a98f871e"
+
+      gethHttpUrl == "http://localhost:8545"
+      gethHttpsUrl == "https://localhost:8545"
+      unspecifiedProtocolUrl == "ws://localhost:8545"
+
+      gethWsUrl == "ws://localhost:8545"
+
   test "Roundtrip engine RPC and consensus ExecutionPayload representations":
     # Each Eth2Digest field is chosen randomly. Each uint64 field is random,
     # with boosted probabilities for 0, 1, and high(uint64). There can be 0,