diff --git a/src/README.md b/src/README.md
index 0678505..b0a0c4a 100644
--- a/src/README.md
+++ b/src/README.md
@@ -153,7 +153,8 @@ See [`AltoParameters`](https://github.com/wevm/prool/blob/801ede06ded8b2cb2d59c9
 #### Requirements
 
 - [Rundler](https://github.com/alchemyplatform/rundler) binary installed
-  - [Download](https://github.com/alchemyplatform/rundler/releases)
+  - [Download v0.3.x](https://github.com/alchemyplatform/rundler/releases/tag/v0.3.0)
+  - Add to `PATH`
 
 #### Usage
 
diff --git a/src/instances/rundler.ts b/src/instances/rundler.ts
index b9ddf1e..7d036df 100644
--- a/src/instances/rundler.ts
+++ b/src/instances/rundler.ts
@@ -12,13 +12,6 @@ export type RundlerParameters = {
    */
   binary?: string
 
-  /**
-   * The version of the entrypoint to use
-   *
-   * @default 0.6.0
-   */
-  entryPointVersion?: '0.6.0' | '0.7.0'
-
   /**
    * Network to look up a hardcoded chain spec.
    * @default dev
@@ -129,6 +122,31 @@ export type RundlerParameters = {
    */
   mempoolConfigPath?: string
 
+  /**
+   * Disables entry point version v0.6.
+   * @default false
+   */
+  disableEntryPointV0_6?: boolean
+
+  /**
+   * The number of builder accounts to use for entry point version v0.6.
+   *
+   * @default 1
+   */
+  numBuildersV0_6?: number
+
+  /**
+   * Disables entry point version v0.7.
+   * @default false
+   */
+  disableEntryPointV0_7?: boolean
+
+  /**
+   * The number of builder accounts to use for entry point version v0.7.
+   * @default 1
+   */
+  numBuildersV0_7?: number
+
   metrics?: {
     /**
      * Port to listen on for metrics requests.
@@ -261,18 +279,20 @@ export type RundlerParameters = {
 
   builder?: {
     /**
-     * Private key to use for signing transactions.
+     * Private keys to use for signing transactions.
      * If used with awsKmsKeyIds, then explicitly pass in `null` here.
      *
-     * @default 0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80
+     * @default ['0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80','0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d']
      */
-    privateKey?: string
+    privateKeys?: string[]
 
     /**
-     * AWS KMS key IDs to use for signing transactions (comma-separated).
-     * Only required if privateKey is not provided.
+     * AWS KMS key IDs to use for signing transactions.
+     * Only required if privateKeys is not provided.
+     *
+     * @default null
      */
-    awsKmsKeyIds?: string
+    awsKmsKeyIds?: string[]
 
     /**
      * Redis URI to use for KMS leasing.
@@ -304,9 +324,21 @@ export type RundlerParameters = {
     /**
      * Choice of what sender type to use for transaction submission.
      * @default raw
-     * options: raw, conditional, flashbots, polygon_bloxroute
+     * options: raw, flashbots, polygon_bloxroute
+     */
+    sender?: 'raw' | 'flashbots' | 'polygonBloxroute'
+
+    /**
+     * Use the submit URL for transaction status checks.
+     * @default false
+     */
+    use_submit_for_status?: boolean
+
+    /**
+     * If the sender supports the 'dropped' status. Many senders do not support this status, and only support 'pending' or 'mined'.
+     * @default false
      */
-    sender?: 'raw' | 'conditional' | 'flashbots' | 'polygonBloxroute'
+    dropped_status_unsupported?: boolean
 
     /**
      * After submitting a bundle transaction, the maximum number of blocks to wait for that transaction to mine before trying to resend with higher gas fees.
@@ -321,11 +353,16 @@ export type RundlerParameters = {
     replacementFeePercentIncrease?: number
 
     /**
-     * Maximum number of fee increases to attempt.
-     * Seven increases of 10% is roughly 2x the initial fees.
-     * @default 7
+     * Maximum number of fee increases to attempt during a cancellation.
+     * @default 15
      */
-    maxFeeIncreases?: number
+    maxCancellationFeeIncreases?: number
+
+    /**
+     * The maximum number of blocks to spend in a replacement underpriced state before issuing a transaction cancellation.
+     * @default 20
+     */
+    maxReplacementUnderpricedBlocks?: number
 
     /**
      * Additional builders to send bundles to through the Flashbots relay RPC (comma-separated).
@@ -392,11 +429,11 @@ export const rundler = defineInstance((parameters?: RundlerParameters) => {
         ...args,
         builder: {
           ...args.builder,
-          privateKey:
-            args.builder?.privateKey ??
+          privateKeys: args.builder?.privateKeys ?? [
             '0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80',
+            '0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d',
+          ],
         },
-        entryPointVersion: undefined,
         maxVerificationGas: args.maxVerificationGas ?? 10000000,
         network: args.network ?? 'dev',
         nodeHttp: args.nodeHttp ?? 'http://localhost:8545',
@@ -413,23 +450,13 @@ export const rundler = defineInstance((parameters?: RundlerParameters) => {
           args.userOperationEventBlockDistance ?? 100,
       } satisfies RundlerParameters
 
-      const entrypointArgs = (() => {
-        if (args.entryPointVersion === '0.6.0')
-          return ['--disable_entry_point_v0_7']
-        return ['--disable_entry_point_v0_6']
-      })()
-
       return await process.start(
         ($) =>
-          $(
-            binary,
-            ['node', ...toArgs(args_, { casing: 'snake' }), ...entrypointArgs],
-            {
-              env: {
-                RUST_LOG: 'debug',
-              },
+          $(binary, ['node', ...toArgs(args_, { casing: 'snake' })], {
+            env: {
+              RUST_LOG: 'debug',
             },
-          ),
+          }),
         {
           ...options,
           resolver({ process, reject, resolve }) {