diff --git a/server/storage.ts b/server/storage.ts
index 45b028b..d9fc94b 100644
--- a/server/storage.ts
+++ b/server/storage.ts
@@ -160,8 +160,9 @@ export class DatabaseStorage implements IStorage {
       conditions.push(eq(detections.anomalyType, anomalyType));
     }
     
+    // Cast riskScore to numeric for proper comparison (stored as text in DB)
     if (minScore !== undefined) {
-      conditions.push(gte(detections.riskScore, minScore.toString()));
+      conditions.push(sql`${detections.riskScore}::numeric >= ${minScore}`);
     }
     
     if (maxScore !== undefined) {