diff --git a/crates/rpc/rpc-builder/src/auth.rs b/crates/rpc/rpc-builder/src/auth.rs
index eb83578ee609..edf398117e85 100644
--- a/crates/rpc/rpc-builder/src/auth.rs
+++ b/crates/rpc/rpc-builder/src/auth.rs
@@ -208,8 +208,13 @@ impl AuthServerConfigBuilder {
             secret: self.secret,
             server_config: self.server_config.unwrap_or_else(|| {
                 ServerBuilder::new()
-                    // allows for 300mb responses (for large eth_getLogs deposit logs)
-                    .max_response_body_size(300 * 1024 * 1024)
+                    // This needs to large enough to handle large eth_getLogs responses and maximum
+                    // payload bodies limit for `engine_getPayloadBodiesByRangeV`
+                    // ~750MB per response should be enough
+                    .max_response_body_size(750 * 1024 * 1024)
+                    // bump the default request size slightly, there aren't any methods exposed with
+                    // dynamic request params that can exceed this
+                    .max_request_body_size(25 * 1024 * 1024)
                     .set_id_provider(EthSubscriptionIdProvider::default())
             }),
         }