diff --git a/plugins/alarm/actions/http_action.cpp b/plugins/alarm/actions/http_action.cpp
index 2a6c7c7..89ebec6 100644
--- a/plugins/alarm/actions/http_action.cpp
+++ b/plugins/alarm/actions/http_action.cpp
@@ -5,6 +5,7 @@
 #include <cctype>
 #include <cstdlib>
 #include <ctime>
+#include <iomanip>
 #include <sstream>
 #include <string>
 #include <string_view>
@@ -111,7 +112,7 @@ void HttpAction::Execute(AlarmEvent& event, std::shared_ptr<Frame> /*frame*/) {
         const auto& det = event.detections[i];
         if (i > 0) oss << ",";
         oss << "{\"cls_id\":" << det.cls_id
-            << ",\"score\":" << det.score
+            << ",\"score\":" << std::fixed << std::setprecision(2) << det.score
             << ",\"bbox\":{\"x\":" << det.bbox.x
             << ",\"y\":" << det.bbox.y
             << ",\"w\":" << det.bbox.w
diff --git a/plugins/alarm/alarm_node.cpp b/plugins/alarm/alarm_node.cpp
index e93a527..8a24b6e 100644
--- a/plugins/alarm/alarm_node.cpp
+++ b/plugins/alarm/alarm_node.cpp
@@ -952,7 +952,10 @@ private:
                 Detection d;
                 d.cls_id = -1;
                 // Unknown: show stranger likelihood (1 - best_sim). Known: show match confidence (best_sim).
-                d.score = (rule.kind == FaceRule::Kind::Unknown) ? (1.0f - it.best_sim) : it.best_sim;
+                float rawScore = (rule.kind == FaceRule::Kind::Unknown) ? (1.0f - it.best_sim) : it.best_sim;
+                if (rawScore < 0.0f) rawScore = 0.0f;
+                if (rawScore > 0.99f) rawScore = 0.99f;
+                d.score = rawScore;
                 d.bbox = it.bbox;
                 d.track_id = it.person_track_id >= 0 ? it.person_track_id : it.best_person_id;
                 dets.push_back(std::move(d));