diff --git a/packages/api/package.json b/packages/api/package.json
index 8407d3705a6c..ae0cf6b9c16f 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -67,8 +67,8 @@
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {
-    "@chainsafe/persistent-merkle-tree": "^0.6.1",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/persistent-merkle-tree": "^0.7.1",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/config": "^1.17.0",
     "@lodestar/params": "^1.17.0",
     "@lodestar/types": "^1.17.0",
diff --git a/packages/beacon-node/package.json b/packages/beacon-node/package.json
index 609cc5c9f04f..329ef91f5979 100644
--- a/packages/beacon-node/package.json
+++ b/packages/beacon-node/package.json
@@ -100,9 +100,9 @@
     "@chainsafe/libp2p-gossipsub": "^11.2.1",
     "@chainsafe/libp2p-identify": "^1.0.0",
     "@chainsafe/libp2p-noise": "^14.1.0",
-    "@chainsafe/persistent-merkle-tree": "^0.6.1",
+    "@chainsafe/persistent-merkle-tree": "^0.7.1",
     "@chainsafe/prometheus-gc-stats": "^1.0.0",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@chainsafe/threads": "^1.11.1",
     "@ethersproject/abi": "^5.7.0",
     "@fastify/bearer-auth": "^9.0.0",
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 2bf6bc6dc708..c905abb846b5 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -57,8 +57,8 @@
     "@chainsafe/blst": "^0.2.10",
     "@chainsafe/discv5": "^9.0.0",
     "@chainsafe/enr": "^3.0.0",
-    "@chainsafe/persistent-merkle-tree": "^0.6.1",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/persistent-merkle-tree": "^0.7.1",
+    "@chainsafe/ssz": "^0.15.1",
     "@chainsafe/threads": "^1.11.1",
     "@libp2p/crypto": "^3.0.4",
     "@libp2p/peer-id": "^4.0.4",
diff --git a/packages/config/package.json b/packages/config/package.json
index 60f8484ee928..741023fabadc 100644
--- a/packages/config/package.json
+++ b/packages/config/package.json
@@ -64,7 +64,7 @@
     "blockchain"
   ],
   "dependencies": {
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/params": "^1.17.0",
     "@lodestar/types": "^1.17.0"
   }
diff --git a/packages/db/package.json b/packages/db/package.json
index dcb0b66b920f..4bde7b173731 100644
--- a/packages/db/package.json
+++ b/packages/db/package.json
@@ -35,7 +35,7 @@
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/config": "^1.17.0",
     "@lodestar/utils": "^1.17.0",
     "it-all": "^3.0.4",
diff --git a/packages/fork-choice/package.json b/packages/fork-choice/package.json
index a8c708ec7525..c89376c5a8fe 100644
--- a/packages/fork-choice/package.json
+++ b/packages/fork-choice/package.json
@@ -36,7 +36,7 @@
     "check-readme": "typescript-docs-verifier"
   },
   "dependencies": {
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/config": "^1.17.0",
     "@lodestar/params": "^1.17.0",
     "@lodestar/state-transition": "^1.17.0",
diff --git a/packages/light-client/package.json b/packages/light-client/package.json
index b8c0ce76c225..10ba1fa1b3f8 100644
--- a/packages/light-client/package.json
+++ b/packages/light-client/package.json
@@ -66,8 +66,8 @@
   },
   "dependencies": {
     "@chainsafe/bls": "7.1.3",
-    "@chainsafe/persistent-merkle-tree": "^0.6.1",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/persistent-merkle-tree": "^0.7.1",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/api": "^1.17.0",
     "@lodestar/config": "^1.17.0",
     "@lodestar/params": "^1.17.0",
diff --git a/packages/state-transition/package.json b/packages/state-transition/package.json
index 270cfa441357..b9e74baa1435 100644
--- a/packages/state-transition/package.json
+++ b/packages/state-transition/package.json
@@ -61,9 +61,9 @@
     "@chainsafe/as-sha256": "^0.4.1",
     "@chainsafe/bls": "7.1.3",
     "@chainsafe/blst": "^0.2.10",
-    "@chainsafe/persistent-merkle-tree": "^0.6.1",
+    "@chainsafe/persistent-merkle-tree": "^0.7.1",
     "@chainsafe/persistent-ts": "^0.19.1",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/config": "^1.17.0",
     "@lodestar/params": "^1.17.0",
     "@lodestar/types": "^1.17.0",
diff --git a/packages/types/package.json b/packages/types/package.json
index 376778e6e8d3..debff7534aca 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -73,7 +73,7 @@
   },
   "types": "lib/index.d.ts",
   "dependencies": {
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/params": "^1.17.0",
     "ethereum-cryptography": "^2.0.0"
   },
diff --git a/packages/types/src/phase0/sszTypes.ts b/packages/types/src/phase0/sszTypes.ts
index 78988465d274..6bafdb8fc3a7 100644
--- a/packages/types/src/phase0/sszTypes.ts
+++ b/packages/types/src/phase0/sszTypes.ts
@@ -6,6 +6,7 @@ import {
   ListBasicType,
   ListCompositeType,
   VectorBasicType,
+  ListUintNum64Type,
   VectorCompositeType,
 } from "@chainsafe/ssz";
 import {
@@ -245,7 +246,8 @@ export const Validator = ValidatorNodeStruct;
 
 // Export as stand-alone for direct tree optimizations
 export const Validators = new ListCompositeType(ValidatorNodeStruct, VALIDATOR_REGISTRY_LIMIT);
-export const Balances = new ListBasicType(UintNum64, VALIDATOR_REGISTRY_LIMIT);
+// this ListUintNum64Type is used to cache Leaf Nodes of BeaconState.balances after epoch transition
+export const Balances = new ListUintNum64Type(VALIDATOR_REGISTRY_LIMIT);
 export const RandaoMixes = new VectorCompositeType(Bytes32, EPOCHS_PER_HISTORICAL_VECTOR);
 /**
  * This is initially a Gwei (BigInt) vector, however since Nov 2023 it's converted to UintNum64 (number) vector in the state transition because:
diff --git a/packages/validator/package.json b/packages/validator/package.json
index 31ec656d0918..667ba286b86b 100644
--- a/packages/validator/package.json
+++ b/packages/validator/package.json
@@ -46,7 +46,7 @@
   ],
   "dependencies": {
     "@chainsafe/bls": "7.1.3",
-    "@chainsafe/ssz": "^0.14.3",
+    "@chainsafe/ssz": "^0.15.1",
     "@lodestar/api": "^1.17.0",
     "@lodestar/config": "^1.17.0",
     "@lodestar/db": "^1.17.0",
diff --git a/yarn.lock b/yarn.lock
index c744a9b4ede6..c23126d62dd0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -447,6 +447,14 @@
     "@chainsafe/as-sha256" "^0.4.1"
     "@noble/hashes" "^1.3.0"
 
+"@chainsafe/persistent-merkle-tree@^0.7.1":
+  version "0.7.1"
+  resolved "https://registry.yarnpkg.com/@chainsafe/persistent-merkle-tree/-/persistent-merkle-tree-0.7.1.tgz#bfe6b3f4296ed3a578bb4fe69f9a7c232822a1dc"
+  integrity sha512-GUomb8DgkbHyKVBoLY9wMBe67oyAK9HKMjPImIocGOJuwqqxvDbVwh/ihdzyOrhEyhISqD/TxhCBDEXzLM52Vg==
+  dependencies:
+    "@chainsafe/as-sha256" "^0.4.1"
+    "@noble/hashes" "^1.3.0"
+
 "@chainsafe/persistent-ts@^0.19.1":
   version "0.19.1"
   resolved "https://registry.npmjs.org/@chainsafe/persistent-ts/-/persistent-ts-0.19.1.tgz"
@@ -465,13 +473,13 @@
     "@chainsafe/as-sha256" "^0.4.1"
     "@chainsafe/persistent-merkle-tree" "^0.6.1"
 
-"@chainsafe/ssz@^0.14.3":
-  version "0.14.3"
-  resolved "https://registry.yarnpkg.com/@chainsafe/ssz/-/ssz-0.14.3.tgz#caae48ae2670b2f8b6febed22b0e0619a636f316"
-  integrity sha512-ldOx4Rk9OC8YMvFdwvHKtRc7KpFRLcXlb9ATCdQ5fHtLT438LRQyxdWFufC9+M8jFHSZcgq31h2BJsSva6sZ0w==
+"@chainsafe/ssz@^0.15.1":
+  version "0.15.1"
+  resolved "https://registry.yarnpkg.com/@chainsafe/ssz/-/ssz-0.15.1.tgz#008a711c3bcdc0d207cd4be15108870b0b1c60c0"
+  integrity sha512-f09UKTyYwWA1nr1BwrwsFpkXMspDDIZtwWXK1pM5mpPMnexmuPVstnN+P0M4YJ2aHcfqJXG7QOqnOwGj5Z7bUw==
   dependencies:
     "@chainsafe/as-sha256" "^0.4.1"
-    "@chainsafe/persistent-merkle-tree" "^0.6.1"
+    "@chainsafe/persistent-merkle-tree" "^0.7.1"
 
 "@chainsafe/threads@^1.11.1":
   version "1.11.1"