diff --git a/packages/sdk/Dockerfile b/packages/sdk/Dockerfile
index c476bbdd..4304300c 100644
--- a/packages/sdk/Dockerfile
+++ b/packages/sdk/Dockerfile
@@ -229,29 +229,25 @@ FROM ${POSTGRES_BASE_IMAGE} AS rollups-database
 COPY --from=postgresql-initdb /var/lib/postgresql/data /var/lib/postgresql/data
 
 ################################################################################
-# alto build
-FROM node:${NODE_VERSION} AS alto
-ARG ALTO_VERSION
-ARG NODE_VERSION
+# rundler install
+FROM base AS rundler
+ARG RUNDLER_VERSION
 ARG TARGETARCH
 ARG TARGETOS
-
-# install foundry, necessary for building alto
-COPY --from=foundry /usr/local/bin/forge /usr/local/bin/forge
-
-WORKDIR /app
-COPY alto.patch /app/alto.patch
-
+WORKDIR /usr/local/bin
 RUN <<EOF
-set -eu
-npm install -g pnpm
-git clone --branch v${ALTO_VERSION} --depth 1 --recurse-submodules https://github.com/pimlicolabs/alto.git
-cd alto
-patch -p1 < /app/alto.patch
-pnpm install
-pnpm run build:contracts
-pnpm run build
-cd src && pnpm pack # produces pimlico-alto-${ALTO_PACKAGE_VERSION}.tgz
+case "${TARGETARCH}" in
+    amd64)
+        curl -fsSL https://github.com/alchemyplatform/rundler/releases/download/v${RUNDLER_VERSION}/rundler-v${RUNDLER_VERSION}-x86_64-unknown-${TARGETOS}-gnu.tar.gz \
+            -o /tmp/rundler.tar.gz
+        echo "b9d9baf7ee145976aab5c392e3e6de16d6aae2e9126a0b20b10a0acab3d75240 /tmp/rundler.tar.gz" | sha256sum --check ;;
+    arm64)
+        curl -fsSL https://github.com/alchemyplatform/rundler/releases/download/v${RUNDLER_VERSION}/rundler-v${RUNDLER_VERSION}-aarch64-unknown-${TARGETOS}-gnu.tar.gz \
+            -o /tmp/rundler.tar.gz
+        echo "3c00812dfc10770d3b7e9ca946e8678927664b65a130a4e47c796380471cfb43 /tmp/rundler.tar.gz" | sha256sum --check ;;
+    *) echo "unsupported architecture: ${TARGETARCH}"; exit 1 ;;
+esac
+tar -xvzf /tmp/rundler.tar.gz
 EOF
 
 ################################################################################
@@ -278,8 +274,6 @@ RUN tar -xJf "/tmp/linux-headers-${CARTESI_LINUX_KERNEL_VERSION}.tar.xz" -C /
 ################################################################################
 # sdk final image
 FROM rollups-runtime
-ARG ALTO_VERSION
-ARG ALTO_PACKAGE_VERSION
 ARG CARTESI_DEVNET_VERSION
 ARG CARTESI_MACHINE_EMULATOR_VERSION
 ARG CARTESI_PAYMASTER_VERSION
@@ -330,15 +324,12 @@ update-locale LANG=en_US.UTF-8
 EOF
 
 # Install nodejs packages
-COPY --from=alto /app/alto/src/pimlico-alto-${ALTO_PACKAGE_VERSION}.tgz /tmp/pimlico-alto.tgz
 RUN <<EOF
 npm install -g \
     @cartesi/devnet@${CARTESI_DEVNET_VERSION} \
     @cartesi/mock-verifying-paymaster@${CARTESI_PAYMASTER_VERSION} \
-    @cartesi/passkey-server@${CARTESI_PASSKEY_SERVER_VERSION} \
-    /tmp/pimlico-alto.tgz
+    @cartesi/passkey-server@${CARTESI_PASSKEY_SERVER_VERSION}
 
-rm /tmp/pimlico-alto.tgz
 mkdir -p /usr/share/cartesi
 cp -r "$(npm root -g)/@cartesi/devnet/deployments" /usr/share/cartesi/
 cp "$(npm root -g)/@cartesi/devnet/anvil_state.json" /usr/share/cartesi/
@@ -349,7 +340,6 @@ ENV LANG=en_US.UTF-8
 ENV LANGUAGE=en_US:en
 
 # healthcheck script using net_listening JSON-RPC method
-COPY alto /usr/local/bin
 COPY devnet /usr/local/bin
 COPY eth_isready /usr/local/bin
 
@@ -359,6 +349,7 @@ COPY --from=foundry /usr/local/bin/cast /usr/local/bin/
 COPY --from=squashfs-tools /usr/local/src/squashfs-tools/mksquashfs /usr/local/bin/
 COPY --from=kernel-image /usr/share/cartesi-machine/images/linux.bin /usr/share/cartesi-machine/images/linux.bin
 COPY --from=kernel-headers /include/linux /include/linux
+COPY --from=rundler /usr/local/bin/rundler /usr/local/bin/
 
 WORKDIR /mnt
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
diff --git a/packages/sdk/alto b/packages/sdk/alto
deleted file mode 100755
index f1acde60..00000000
--- a/packages/sdk/alto
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/sh
-node "$(npm root -g)/@pimlico/alto/lib/cli/alto.js" $@
diff --git a/packages/sdk/alto.patch b/packages/sdk/alto.patch
deleted file mode 100644
index 59a663ea..00000000
--- a/packages/sdk/alto.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-From a099789dc4175cf90b6ca60f6e57b01d24fb1373 Mon Sep 17 00:00:00 2001
-From: Danilo Tuler <tuler@pobox.com>
-Date: Thu, 22 May 2025 14:05:21 -0400
-Subject: [PATCH] fixing package to include missing contract jsons
-
----
- src/package.json | 2 ++
- 1 file changed, 2 insertions(+)
-
-diff --git a/src/package.json b/src/package.json
-index 9020c26..ef37f87 100644
---- a/src/package.json
-+++ b/src/package.json
-@@ -14,9 +14,11 @@
-         "esm/**/*.d.ts",
-         "esm/**/*.js",
-         "esm/**/*.js.map",
-+        "esm/**/*.json",
-         "lib/**/*.d.ts",
-         "lib/**/*.js",
-         "lib/**/*.js.map",
-+        "lib/**/*.json",
-         "contracts/**/*",
-         "*.d.ts",
-         "*.js"
--- 
-2.48.1
-
diff --git a/packages/sdk/docker-bake.hcl b/packages/sdk/docker-bake.hcl
index c4035786..58cdfb6e 100644
--- a/packages/sdk/docker-bake.hcl
+++ b/packages/sdk/docker-bake.hcl
@@ -6,8 +6,6 @@ target "docker-platforms" {}
 target "default" {
   inherits = ["docker-platforms"]
   args = {
-    ALTO_VERSION                      = "1.2.5"
-    ALTO_PACKAGE_VERSION              = "0.0.18"
     CARTESI_BASE_IMAGE                = "docker.io/library/debian:trixie-20260223-slim@sha256:1d3c811171a08a5adaa4a163fbafd96b61b87aa871bbc7aa15431ac275d3d430"
     CARTESI_DEVNET_VERSION            = "2.0.0-alpha.10"
     CARTESI_IMAGE_KERNEL_VERSION      = "0.20.0"
@@ -21,6 +19,7 @@ target "default" {
     NODE_VERSION                      = "24.12.0"
     NVM_VERSION                       = "977563e97ddc66facf3a8e31c6cff01d236f09bd" # 0.40.3
     POSTGRES_BASE_IMAGE               = "docker.io/library/postgres:17-trixie@sha256:9ba47fa6d1c34e9cc4c1758640e7774a9b73ea0fba891f14088321ba7561d253"
+    RUNDLER_VERSION                   = "0.11.0"
     SQUASHFS_TOOLS_VERSION            = "bad1d213ab6df587d6fa0ef7286180fbf7b86167" # 4.7.4
     SU_EXEC_VERSION                   = "0.3"
     TINI_VERSION                      = "0.19.0"