diff --git a/CHANGELOG.md b/CHANGELOG.md
index 566568a4d5b3..f92fbfaf5209 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - DB optimization for saving light client bootstraps (save unique sync committees only).
 - Trace IDONTWANT Messages in Pubsub.
 - Add Fulu fork boilerplate.
+- Update spec tests to v1.5.0-beta.0.
 
 ### Changed
 
diff --git a/WORKSPACE b/WORKSPACE
index 9fa4a648bc31..7fa14f69c204 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -227,7 +227,7 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.5.0-alpha.10"
+consensus_spec_version = "v1.5.0-beta.0"
 
 bls_test_version = "v0.1.1"
 
@@ -243,7 +243,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-NtWIhbO/mVMb1edq5jqABL0o8R1tNFiuG8PCMAsUHcs=",
+    integrity = "sha256-HdMlTN3wv+hUMCkIRPk+EHcLixY1cSZlvkx3obEp4AM=",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )
 
@@ -259,7 +259,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-DFlFlnzls1bBrDm+/xD8NK2ivvkhxR+rSNVLLqScVKc=",
+    integrity = "sha256-eX/ihmHQ+OvfoGJxSMgy22yAU3SZ3xjsX0FU0EaZrSs=",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )
 
@@ -275,7 +275,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-G9ENPF8udZL/BqRHbi60GhFPnZDPZAH6UjcjRiOlvbk=",
+    integrity = "sha256-k3Onf42vOzIqyddecR6G82sDy3mmDA+R8RN66QjB0GI=",
     url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )
 
@@ -290,7 +290,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-ClOLKkmAcEi8/uKi6LDeqthask5+E3sgxVoA0bqmQ0c=",
+    integrity = "sha256-N/d4AwdOSlb70Dr+2l20dfXxNSzJDj/qKA9Rkn8Gb5w=",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )
diff --git a/config/params/loader_test.go b/config/params/loader_test.go
index 0fb84dde8364..3a692414041c 100644
--- a/config/params/loader_test.go
+++ b/config/params/loader_test.go
@@ -38,6 +38,7 @@ var placeholderFields = []string{
 	"MAX_BLOB_COMMITMENTS_PER_BLOCK", // Compile time constant on BeaconBlockBodyDeneb.blob_kzg_commitments.
 	"MAX_BYTES_PER_TRANSACTION",      // Used for ssz of EL transactions. Unused in Prysm.
 	"MAX_EXTRA_DATA_BYTES",           // Compile time constant on ExecutionPayload.extra_data.
+	"MAX_PAYLOAD_SIZE",
 	"MAX_REQUEST_BLOB_SIDECARS_FULU",
 	"MAX_REQUEST_PAYLOADS",         // Compile time constant on BeaconBlockBody.ExecutionRequests
 	"MAX_TRANSACTIONS_PER_PAYLOAD", // Compile time constant on ExecutionPayload.transactions.