diff --git a/src/lib/graph-api.ts b/src/lib/graph-api.ts
index bead31a..3e3154f 100644
--- a/src/lib/graph-api.ts
+++ b/src/lib/graph-api.ts
@@ -1175,7 +1175,11 @@ export async function approveReview(
     }
     return { status: "Success", review }
   }
-  const body = overridePayload ? { override_payload: overridePayload } : {}
+  // cancel_active_runs: an admin deciding here makes any in-flight
+  // human-review workflow moot, so ask the backend to stop it. Workflows
+  // deciding their own reviews omit this — cancelling would kill their run.
+  const body: Record<string, unknown> = { cancel_active_runs: true }
+  if (overridePayload) body.override_payload = overridePayload
   return api.post<ReviewDecisionResponse>(
     `/v2/reviews/${refId}/approve`,
     body,
@@ -1200,9 +1204,10 @@ export async function dismissReview(
     }
     return { status: "Success", review }
   }
+  // cancel_active_runs: same admin-decided semantics as approveReview above.
   return api.post<ReviewDecisionResponse>(
     `/v2/reviews/${refId}/dismiss`,
-    { reason },
+    { reason, cancel_active_runs: true },
     undefined,
     signal
   )