diff --git a/.github/scripts/modal-run-integ-tests.sh b/.github/scripts/modal-run-integ-tests.sh
index 0713ffd57..e05702b9b 100755
--- a/.github/scripts/modal-run-integ-tests.sh
+++ b/.github/scripts/modal-run-integ-tests.sh
@@ -1,18 +1,23 @@
 #!/bin/bash
 # Run simulation integration tests
-# Usage: ./modal-run-integ-tests.sh <environment> <base-url>
+# Usage: ./modal-run-integ-tests.sh <environment> <base-url> [us-version]
 # Environment: beta runs all tests, prod excludes beta_only tests
 
 set -euo pipefail
 
 ENVIRONMENT="${1:?Environment required (beta or prod)}"
 BASE_URL="${2:?Base URL required}"
+US_VERSION="${3:-}"
 
 cd projects/policyengine-apis-integ
 uv sync --extra test
 
 export simulation_integ_test_base_url="$BASE_URL"
 
+if [ -n "$US_VERSION" ]; then
+  export simulation_integ_test_us_model_version="$US_VERSION"
+fi
+
 if [ "$ENVIRONMENT" = "beta" ]; then
   echo "Running all simulation integration tests (including beta_only)"
   uv run pytest tests/simulation/ -v
diff --git a/.github/workflows/modal-deploy.reusable.yml b/.github/workflows/modal-deploy.reusable.yml
index 971eb7053..07ce2d777 100644
--- a/.github/workflows/modal-deploy.reusable.yml
+++ b/.github/workflows/modal-deploy.reusable.yml
@@ -23,6 +23,7 @@ jobs:
     environment: ${{ inputs.environment }}
     outputs:
       simulation_api_url: ${{ steps.get-url.outputs.simulation_api_url }}
+      us_version: ${{ steps.versions.outputs.us_version }}
 
     steps:
     - name: Checkout repo
@@ -101,4 +102,4 @@ jobs:
       run: ./scripts/generate-clients.sh
 
     - name: Run simulation integration tests
-      run: .github/scripts/modal-run-integ-tests.sh "${{ inputs.environment }}" "${{ needs.deploy.outputs.simulation_api_url }}"
+      run: .github/scripts/modal-run-integ-tests.sh "${{ inputs.environment }}" "${{ needs.deploy.outputs.simulation_api_url }}" "${{ needs.deploy.outputs.us_version }}"
diff --git a/projects/policyengine-api-simulation/src/modal/app.py b/projects/policyengine-api-simulation/src/modal/app.py
index 285201fc5..35974d81e 100644
--- a/projects/policyengine-api-simulation/src/modal/app.py
+++ b/projects/policyengine-api-simulation/src/modal/app.py
@@ -13,7 +13,7 @@
 from src.modal._image_setup import snapshot_models
 
 # Get versions from environment or use defaults
-US_VERSION = os.environ.get("POLICYENGINE_US_VERSION", "1.459.0")
+US_VERSION = os.environ.get("POLICYENGINE_US_VERSION", "1.562.3")
 UK_VERSION = os.environ.get("POLICYENGINE_UK_VERSION", "2.65.9")
 
 
diff --git a/projects/policyengine-api-simulation/uv.lock b/projects/policyengine-api-simulation/uv.lock
index 18a379ee5..209a2b661 100644
--- a/projects/policyengine-api-simulation/uv.lock
+++ b/projects/policyengine-api-simulation/uv.lock
@@ -725,6 +725,7 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/ec/ab/d26750f2b7242c2b90ea2ad71de70cfcd73a948a49513188a0fc0d6fc15a/greenlet-3.3.1-cp313-cp313-macosx_11_0_universal2.whl", hash = "sha256:7ab327905cabb0622adca5971e488064e35115430cec2c35a50fd36e72a315b3", size = 275205, upload-time = "2026-01-23T15:30:24.556Z" },
     { url = "https://files.pythonhosted.org/packages/10/d3/be7d19e8fad7c5a78eeefb2d896a08cd4643e1e90c605c4be3b46264998f/greenlet-3.3.1-cp313-cp313-manylinux_2_24_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:65be2f026ca6a176f88fb935ee23c18333ccea97048076aef4db1ef5bc0713ac", size = 599284, upload-time = "2026-01-23T16:00:58.584Z" },
     { url = "https://files.pythonhosted.org/packages/ae/21/fe703aaa056fdb0f17e5afd4b5c80195bbdab701208918938bd15b00d39b/greenlet-3.3.1-cp313-cp313-manylinux_2_24_ppc64le.manylinux_2_28_ppc64le.whl", hash = "sha256:7a3ae05b3d225b4155bda56b072ceb09d05e974bc74be6c3fc15463cf69f33fd", size = 610274, upload-time = "2026-01-23T16:05:29.312Z" },
+    { url = "https://files.pythonhosted.org/packages/06/00/95df0b6a935103c0452dad2203f5be8377e551b8466a29650c4c5a5af6cc/greenlet-3.3.1-cp313-cp313-manylinux_2_24_s390x.manylinux_2_28_s390x.whl", hash = "sha256:12184c61e5d64268a160226fb4818af4df02cfead8379d7f8b99a56c3a54ff3e", size = 624375, upload-time = "2026-01-23T16:15:55.915Z" },
     { url = "https://files.pythonhosted.org/packages/cb/86/5c6ab23bb3c28c21ed6bebad006515cfe08b04613eb105ca0041fecca852/greenlet-3.3.1-cp313-cp313-manylinux_2_24_x86_64.manylinux_2_28_x86_64.whl", hash = "sha256:6423481193bbbe871313de5fd06a082f2649e7ce6e08015d2a76c1e9186ca5b3", size = 612904, upload-time = "2026-01-23T15:32:52.317Z" },
     { url = "https://files.pythonhosted.org/packages/c2/f3/7949994264e22639e40718c2daf6f6df5169bf48fb038c008a489ec53a50/greenlet-3.3.1-cp313-cp313-musllinux_1_2_aarch64.whl", hash = "sha256:33a956fe78bbbda82bfc95e128d61129b32d66bcf0a20a1f0c08aa4839ffa951", size = 1567316, upload-time = "2026-01-23T16:04:23.316Z" },
     { url = "https://files.pythonhosted.org/packages/8d/6e/d73c94d13b6465e9f7cd6231c68abde838bb22408596c05d9059830b7872/greenlet-3.3.1-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:4b065d3284be43728dd280f6f9a13990b56470b81be20375a207cdc814a983f2", size = 1636549, upload-time = "2026-01-23T15:33:48.643Z" },
@@ -1589,7 +1590,7 @@ name = "pexpect"
 version = "4.9.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "ptyprocess" },
+    { name = "ptyprocess", marker = "sys_platform != 'emscripten' and sys_platform != 'win32'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/42/92/cc564bf6381ff43ce1f4d06852fc19a2f11d180f23dc32d9588bee2f149d/pexpect-4.9.0.tar.gz", hash = "sha256:ee7d41123f3c9911050ea2c2dac107568dc43b2d3b0c7557a33212c398ead30f", size = 166450, upload-time = "2023-11-25T09:07:26.339Z" }
 wheels = [
@@ -1629,7 +1630,7 @@ wheels = [
 
 [[package]]
 name = "policyengine"
-version = "0.12.0"
+version = "0.12.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "diskcache" },
@@ -1641,7 +1642,7 @@ dependencies = [
     { name = "policyengine-us" },
     { name = "pydantic" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/56/2d/b1fd70a42b7d73ad532dac6775e260631475fbca2fe3c1ba4e0320113664/policyengine-0.12.0.tar.gz", hash = "sha256:be31558afe65682df8080fdb1968287549f24009ec91a703047f5afb1646c235", size = 227620, upload-time = "2026-02-05T19:35:25.715Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/1c/ee/e26f2be32041233d27ab3dc76618db4667b23c1180f9926e30401d05f784/policyengine-0.12.1.tar.gz", hash = "sha256:8c3f63725eb6d7dbc23405cf26d1b375d7ca1074b756c7576adb7b0cea8c55ea", size = 229590, upload-time = "2026-02-24T20:13:32.978Z" }
 
 [[package]]
 name = "policyengine-core"
@@ -1747,7 +1748,7 @@ requires-dist = [
     { name = "openapi-python-client", marker = "extra == 'build'", specifier = ">=0.21.6" },
     { name = "opentelemetry-instrumentation-fastapi", specifier = ">=0.51b0,<0.52" },
     { name = "opentelemetry-instrumentation-sqlalchemy", specifier = ">=0.51b0,<0.52" },
-    { name = "policyengine", specifier = "==0.12.0" },
+    { name = "policyengine", specifier = "==0.12.1" },
     { name = "policyengine-core", specifier = ">=3.23.5" },
     { name = "policyengine-fastapi", editable = "../../libs/policyengine-fastapi" },
     { name = "policyengine-uk", specifier = ">=2.22.8" },
diff --git a/projects/policyengine-apis-integ/tests/simulation/conftest.py b/projects/policyengine-apis-integ/tests/simulation/conftest.py
index 1a6d650fe..265249ba1 100644
--- a/projects/policyengine-apis-integ/tests/simulation/conftest.py
+++ b/projects/policyengine-apis-integ/tests/simulation/conftest.py
@@ -10,7 +10,7 @@ class Settings(BaseSettings):
     access_token: str | None = None
     timeout_in_millis: int = 600_000  # 10 minutes for full simulations
     poll_interval_seconds: float = 5.0
-    us_model_version: str = "1.459.0"
+    us_model_version: str = "1.562.3"
 
     model_config = SettingsConfigDict(env_prefix="simulation_integ_test_")