diff --git a/web3.js/rollup.config.js b/web3.js/rollup.config.js
index a9d84dcb0..ca0b14f93 100644
--- a/web3.js/rollup.config.js
+++ b/web3.js/rollup.config.js
@@ -55,6 +55,7 @@ function generateConfig(configType, format) {
     config.external = [
       /@babel\/runtime/,
       '@solana/buffer-layout',
+      '@solana/buffer-layout-utils',
       'bn.js',
       'borsh',
       'bs58',
@@ -112,6 +113,7 @@ function generateConfig(configType, format) {
           config.external = [
             /@babel\/runtime/,
             '@solana/buffer-layout',
+            '@solana/buffer-layout-utils',
             'bn.js',
             'borsh',
             'bs58',