diff --git a/.github/workflows/drift-check.yml b/.github/workflows/drift-check.yml
index ef67f4a..fb5724e 100644
--- a/.github/workflows/drift-check.yml
+++ b/.github/workflows/drift-check.yml
@@ -181,7 +181,7 @@ jobs:
           PY
 
       - name: Upload lifecycle preflight artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: lifecycle-preflight-${{ github.run_id }}-${{ github.run_attempt }}
           path: ${{ runner.temp }}/lifecycle-preflight-bundle
@@ -194,7 +194,7 @@ jobs:
       contents: read
       issues: write
       id-token: write
-    uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@6b887d9954eb656141597eac077ca22053a525ef
+    uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@b939522701b527096e5d028346e777714466bcc5
     with:
       strategy_domain: us_equity
       caller_event_name: ${{ github.event_name }}
@@ -203,7 +203,7 @@ jobs:
       snapshot_checkout_path: external/UsEquitySnapshotPipelines
       snapshot_repository_ref: ${{ needs.preflight_backtests.outputs.snapshot_repository_ref }}
       ai_gateway_service_url: ${{ vars.AI_GATEWAY_SERVICE_URL }}
-      quant_platform_kit_ref: 6b887d9954eb656141597eac077ca22053a525ef
+      quant_platform_kit_ref: b939522701b527096e5d028346e777714466bcc5
       lifecycle_preflight_artifact: lifecycle-preflight-${{ github.run_id }}-${{ github.run_attempt }}
     secrets:
       codex_audit_service_url: ${{ secrets.CODEX_AUDIT_SERVICE_URL }}
diff --git a/pyproject.toml b/pyproject.toml
index b802803..69c1e99 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ requires-python = ">=3.11"
 dependencies = [
   "pandas>=2.0",
   "pytz>=2024.1",
-  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@6b887d9954eb656141597eac077ca22053a525ef",
+  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@b939522701b527096e5d028346e777714466bcc5",
 ]
 
 [tool.setuptools]
diff --git a/qsl.toml b/qsl.toml
index 44b942d..df660ae 100644
--- a/qsl.toml
+++ b/qsl.toml
@@ -6,5 +6,5 @@ bundle = "2026.08.0"
 requires = [
   "pandas>=2.0",
   "pytz>=2024.1",
-  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@6b887d9954eb656141597eac077ca22053a525ef",
+  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@b939522701b527096e5d028346e777714466bcc5",
 ]
diff --git a/tests/test_drift_workflow_config.py b/tests/test_drift_workflow_config.py
index 7b360bc..0f53be5 100644
--- a/tests/test_drift_workflow_config.py
+++ b/tests/test_drift_workflow_config.py
@@ -21,7 +21,7 @@ def test_drift_workflow_wires_real_snapshot_history_and_preflight_bundle() -> No
     assert '"conclusion": "success"' in workflow
     assert '"QuantStrategyLab/UsEquitySnapshotPipelines"' in workflow
     assert "repository: QuantStrategyLab/QuantPlatformKit" in workflow
-    assert "ref: 6b887d9954eb656141597eac077ca22053a525ef" in workflow
+    assert "ref: b939522701b527096e5d028346e777714466bcc5" in workflow
     assert "python -m pip install --no-deps -e external/QuantPlatformKit" in workflow
     assert "scripts/run_walk_forward_backtest.py" in workflow
     assert '"--list-lifecycle-profiles"' in workflow
@@ -29,8 +29,8 @@ def test_drift_workflow_wires_real_snapshot_history_and_preflight_bundle() -> No
     assert "--returns-output" in workflow
     assert "LIFECYCLE_PREFLIGHT_BUNDLE_ROOT" in workflow
     assert "Upload lifecycle preflight artifact" in workflow
-    assert "actions/upload-artifact@v5" in workflow
-    assert "uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@6b887d9954eb656141597eac077ca22053a525ef" in workflow
+    assert "actions/upload-artifact@v6" in workflow
+    assert "uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@b939522701b527096e5d028346e777714466bcc5" in workflow
     assert "strategy_domain: us_equity" in workflow
     assert "caller_event_name: ${{ github.event_name }}" in workflow
     assert "caller_pr_head_repository: ${{ github.event.pull_request.head.repo.full_name || '' }}" in workflow
@@ -38,6 +38,6 @@ def test_drift_workflow_wires_real_snapshot_history_and_preflight_bundle() -> No
     assert "snapshot_checkout_path: external/UsEquitySnapshotPipelines" in workflow
     assert "ai_gateway_service_url: ${{ vars.AI_GATEWAY_SERVICE_URL }}" in workflow
     assert "lifecycle_preflight_artifact: lifecycle-preflight-${{ github.run_id }}-${{ github.run_attempt }}" in workflow
-    assert "quant_platform_kit_ref: 6b887d9954eb656141597eac077ca22053a525ef" in workflow
+    assert "quant_platform_kit_ref: b939522701b527096e5d028346e777714466bcc5" in workflow
     assert "codex_audit_service_url: ${{ secrets.CODEX_AUDIT_SERVICE_URL }}" in workflow
     assert "secrets.SNAPSHOT_REPOSITORY_TOKEN || secrets.QSL_REPO_SYNC_TOKEN || github.token" in workflow
diff --git a/tests/test_qsl_compat_metadata.py b/tests/test_qsl_compat_metadata.py
index 7c6bdca..5b7ea27 100644
--- a/tests/test_qsl_compat_metadata.py
+++ b/tests/test_qsl_compat_metadata.py
@@ -3,7 +3,7 @@
 
 
 ROOT = Path(__file__).resolve().parents[1]
-QPK_REVISION = "6b887d9954eb656141597eac077ca22053a525ef"
+QPK_REVISION = "b939522701b527096e5d028346e777714466bcc5"
 QPK_URL = (
     "quant-platform-kit @ git+https://github.com/QuantStrategyLab/"
     f"QuantPlatformKit.git@{QPK_REVISION}"
diff --git a/uv.lock b/uv.lock
index 3a09fd8..33a3b43 100644
--- a/uv.lock
+++ b/uv.lock
@@ -241,7 +241,7 @@ wheels = [
 [[package]]
 name = "quant-platform-kit"
 version = "0.10.0"
-source = { git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=6b887d9954eb656141597eac077ca22053a525ef#6b887d9954eb656141597eac077ca22053a525ef" }
+source = { git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=b939522701b527096e5d028346e777714466bcc5#b939522701b527096e5d028346e777714466bcc5" }
 
 [[package]]
 name = "six"
@@ -275,5 +275,5 @@ dependencies = [
 requires-dist = [
     { name = "pandas", specifier = ">=2.0" },
     { name = "pytz", specifier = ">=2024.1" },
-    { name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=6b887d9954eb656141597eac077ca22053a525ef" },
+    { name = "quant-platform-kit", git = "https://github.com/QuantStrategyLab/QuantPlatformKit.git?rev=b939522701b527096e5d028346e777714466bcc5" },
 ]