diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07828f1da..27db3fdec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+2021-10-04 v1.5.1
+=================
+
+Nimbus `v1.5.1` is a `high-urgency` release for all users who have already upgraded to `v1.5.0`. It fixes a deposit contract syncing issue manifesting as the warning message "Eth1 chain not synced". Under specific circumstances, such a failure to sync the Eth1 chain may result in missed Eth2 block proposals, so affected users are advised to upgrade as soon as possible.
+
+For anyone still running Nimbus v1.4.x or earlier, migrating to v1.5.1 continues to be a `medium-urgency` but *mandatory* upgrade that must be installed **before October 27th**.
+
+
 2021-10-04 v1.5.0
 =================
 
diff --git a/beacon_chain/eth1/eth1_monitor.nim b/beacon_chain/eth1/eth1_monitor.nim
index 49f386e9a..25848b7c9 100644
--- a/beacon_chain/eth1/eth1_monitor.nim
+++ b/beacon_chain/eth1/eth1_monitor.nim
@@ -12,7 +12,7 @@ import
        typetraits, uri, json],
   # Nimble packages:
   chronos, json, metrics, chronicles/timings,
-  web3, web3/ethtypes as web3Types, web3/ethhexstrings, web3/engine_api,
+  web3, web3/ethtypes as web3Types, web3/ethhexstrings,
   eth/common/eth_types,
   eth/async_utils, stew/byteutils,
   # Local modules:
@@ -422,6 +422,13 @@ proc executePayload*(p: Web3DataProviderRef,
                      payload: engine_api.ExecutionPayload): Future[ExecutePayloadResponse] =
   p.web3.provider.engine_executePayload(payload)
 
+proc consensusValidated*(p: Web3DataProviderRef,
+                         blockHash: BlockHash,
+                         status: BlockValidationStatus): Future[JsonNode] =
+  p.web3.provider.engine_consensusValidated(BlockValidationResult(
+    blockHash: blockHash,
+    status: $status))
+
 proc forkchoiceUpdated*(p: Web3DataProviderRef,
                         headBlock, finalizedBlock: Eth2Digest): Future[JsonNode] =
   p.web3.provider.engine_forkchoiceUpdated(ForkChoiceUpdate(
diff --git a/beacon_chain/version.nim b/beacon_chain/version.nim
index d60b2886e..41c684132 100644
--- a/beacon_chain/version.nim
+++ b/beacon_chain/version.nim
@@ -15,7 +15,7 @@ when not defined(nimscript):
 const
   versionMajor* = 1
   versionMinor* = 5
-  versionBuild* = 0
+  versionBuild* = 1
 
   versionBlob* = "stateofus" # Single word - ends up in the default graffitti
 
diff --git a/vendor/nim-web3 b/vendor/nim-web3
index 9a23474af..97e05aea6 160000
--- a/vendor/nim-web3
+++ b/vendor/nim-web3
@@ -1 +1 @@
-Subproject commit 9a23474afb7e2a14798ec0bf0e69e96cd5895e55
+Subproject commit 97e05aea6573d2630e318e7777a54d95db6ec40e