diff --git a/packages/util/src/block-size-cache.ts b/packages/util/src/block-size-cache.ts
index d27b466c8..d2c7a2c2a 100644
--- a/packages/util/src/block-size-cache.ts
+++ b/packages/util/src/block-size-cache.ts
@@ -2,9 +2,11 @@
 // Copyright 2022 Vulcanize, Inc.
 //
 
-import { utils, providers } from 'ethers';
+import { utils, providers, errors } from 'ethers';
 import debug from 'debug';
 
+import { NULL_BLOCK_ERROR } from './constants';
+
 const log = debug('vulcanize:block-size-cache');
 
 // Number of blocks to cache after current block being processed.
@@ -44,16 +46,26 @@ const cacheBlockSizesAsync = async (provider: providers.JsonRpcProvider, blockNu
 
     // Start prefetching blocks after latest height in blockSizeMap.
     for (let i = startBlockHeight; i <= endBlockHeight; i++) {
-      console.time(`time:misc#cacheBlockSizesAsync-eth_getBlockByNumber-${i}`);
-      const block = await provider.send('eth_getBlockByNumber', [utils.hexStripZeros(utils.hexlify(i)), false]);
-
-      if (block) {
-        const { size, hash } = block;
-        blockSizeMap.set(hash, { size, blockNumber: i });
-      } else {
-        log(`No block found at height ${i}`);
+      try {
+        console.time(`time:misc#cacheBlockSizesAsync-eth_getBlockByNumber-${i}`);
+        const block = await provider.send('eth_getBlockByNumber', [utils.hexStripZeros(utils.hexlify(i)), false]);
+
+        if (block) {
+          const { size, hash } = block;
+          blockSizeMap.set(hash, { size, blockNumber: i });
+        } else {
+          log(`No block found at height ${i}`);
+        }
+      } catch (err: any) {
+        // Handle null block error in case of Lotus EVM
+        if (!(err.code === errors.SERVER_ERROR && err.error && err.error.message === NULL_BLOCK_ERROR)) {
+          throw err;
+        }
+
+        log(`Block ${i} requested was null (FEVM); Fetching next block`);
+      } finally {
+        console.timeEnd(`time:misc#cacheBlockSizesAsync-eth_getBlockByNumber-${i}`);
       }
-      console.timeEnd(`time:misc#cacheBlockSizesAsync-eth_getBlockByNumber-${i}`);
     }
   }
 
diff --git a/packages/util/src/common.ts b/packages/util/src/common.ts
index f33ddbd8f..f780c33c4 100644
--- a/packages/util/src/common.ts
+++ b/packages/util/src/common.ts
@@ -10,7 +10,8 @@ import {
   QUEUE_BLOCK_CHECKPOINT,
   JOB_KIND_PRUNE,
   JOB_KIND_INDEX,
-  UNKNOWN_EVENT_NAME
+  UNKNOWN_EVENT_NAME,
+  NULL_BLOCK_ERROR
 } from './constants';
 import { JobQueue } from './job-queue';
 import { BlockProgressInterface, IndexerInterface, EventInterface } from './types';
@@ -106,7 +107,7 @@ export const fetchBlocksAtHeight = async (
       }
     } catch (err: any) {
       // Handle null block error in case of Lotus EVM
-      if (!(err.code === errors.SERVER_ERROR && err.error && err.error.message === 'requested epoch was a null round')) {
+      if (!(err.code === errors.SERVER_ERROR && err.error && err.error.message === NULL_BLOCK_ERROR)) {
         throw err;
       }
 
@@ -197,7 +198,7 @@ export const _fetchBatchBlocks = async (
       //  Handle null block error in case of Lotus EVM
       //  Otherwise, rethrow error
       const err = result.reason;
-      if (!(err.code === errors.SERVER_ERROR && err.error && err.error.message === 'requested epoch was a null round')) {
+      if (!(err.code === errors.SERVER_ERROR && err.error && err.error.message === NULL_BLOCK_ERROR)) {
         throw err;
       }
 
diff --git a/packages/util/src/constants.ts b/packages/util/src/constants.ts
index ba1b464a5..a5b974cfe 100644
--- a/packages/util/src/constants.ts
+++ b/packages/util/src/constants.ts
@@ -29,3 +29,5 @@ export const DEFAULT_PREFETCH_BATCH_SIZE = 10;
 export const DEFAULT_MAX_GQL_CACHE_SIZE = Math.pow(2, 20) * 8; // 8 MB
 
 export const SUPPORTED_PAID_RPC_METHODS = ['eth_getBlockByHash', 'eth_getStorageAt', 'eth_getBlockByNumber'];
+
+export const NULL_BLOCK_ERROR = 'requested epoch was a null round';