diff --git a/engine/engine.go b/engine/engine.go
index 21817bc..6c1e4c5 100644
--- a/engine/engine.go
+++ b/engine/engine.go
@@ -24,6 +24,7 @@ type ScoringEngine struct {
 	Config                *config.ConfigSettings
 	CredentialsMutex      map[uint]*sync.Mutex
 	UptimePerService      map[uint]map[string]db.Uptime
+	uptimeMu              sync.RWMutex
 	SlaPerService         map[uint]map[string]int
 	EnginePauseWg         *sync.WaitGroup
 	IsEnginePaused        bool
@@ -81,9 +82,11 @@ func (se *ScoringEngine) Start() {
 		se.CurrentRound = uint(t.ID) + 1
 	}
 
+	se.uptimeMu.Lock()
 	if err := db.LoadUptimes(&se.UptimePerService); err != nil {
 		slog.Error("failed to load uptimes", "error", err)
 	}
+	se.uptimeMu.Unlock()
 
 	if err := db.LoadSLAs(&se.SlaPerService, se.Config.MiscSettings.SlaThreshold); err != nil {
 		slog.Error("failed to load SLAs", "error", err)
@@ -201,6 +204,14 @@ func (se *ScoringEngine) GetUptimePerService() map[uint]map[string]db.Uptime {
 	return se.UptimePerService
 }
 
+func (se *ScoringEngine) RLockUptime() {
+	se.uptimeMu.RLock()
+}
+
+func (se *ScoringEngine) RUnlockUptime() {
+	se.uptimeMu.RUnlock()
+}
+
 // GetActiveTasks returns all active and recently completed tasks
 func (se *ScoringEngine) GetActiveTasks() (map[string]any, error) {
 	ctx := context.Background()
@@ -312,7 +323,9 @@ func (se *ScoringEngine) ResetScores() error {
 	se.RedisClient.Publish(context.Background(), "events", "reset")
 
 	se.CurrentRound = 1
+	se.uptimeMu.Lock()
 	se.UptimePerService = make(map[uint]map[string]db.Uptime)
+	se.uptimeMu.Unlock()
 	se.SlaPerService = make(map[uint]map[string]int)
 	slog.Info("Scores reset and Redis queues cleared successfully")
 
@@ -536,6 +549,7 @@ func (se *ScoringEngine) processCollectedResults(results []checks.Result) {
 		return
 	}
 
+	se.uptimeMu.Lock()
 	for _, result := range results {
 		// Update uptime and SLA maps
 		if _, ok := se.UptimePerService[result.TeamID]; !ok {
@@ -575,6 +589,7 @@ func (se *ScoringEngine) processCollectedResults(results []checks.Result) {
 			}
 		}
 	}
+	se.uptimeMu.Unlock()
 
 	slog.Debug("Successfully processed results for round", "round", se.CurrentRound, "total", len(dbResults))
 
diff --git a/www/api/graphs.go b/www/api/graphs.go
index 4307876..e8c94a3 100644
--- a/www/api/graphs.go
+++ b/www/api/graphs.go
@@ -165,6 +165,7 @@ func GetUptimeStatus(w http.ResponseWriter, r *http.Request) {
 	}
 	teams = slices.DeleteFunc(teams, func(team db.TeamSchema) bool { return !team.Active })
 
+	eng.RLockUptime()
 	uptime := eng.GetUptimePerService()
 
 	// TODO: make db unique function or get from config
@@ -205,6 +206,7 @@ func GetUptimeStatus(w http.ResponseWriter, r *http.Request) {
 		s.Data = points
 		series = append(series, s)
 	}
+	eng.RUnlockUptime()
 
 	if shouldScrub(r) {
 		for i := range series {
diff --git a/www/api/services.go b/www/api/services.go
index da0a7fc..32707ff 100644
--- a/www/api/services.go
+++ b/www/api/services.go
@@ -154,9 +154,11 @@ func GetTeamSummary(w http.ResponseWriter, r *http.Request) {
 		Uptime       float64          `json:"Uptime"`
 	}
 
+	eng.RLockUptime()
+	uptimeMap := eng.GetUptimePerService()
 	var s []summary
 	for _, v := range summaries {
-		uptime := eng.UptimePerService[teamID][v["ServiceName"].(string)]
+		uptime := uptimeMap[teamID][v["ServiceName"].(string)]
 		s = append(s, summary{
 			ServiceName:  v["ServiceName"].(string),
 			SlaCount:     v["SlaCount"].(int),
@@ -164,6 +166,7 @@ func GetTeamSummary(w http.ResponseWriter, r *http.Request) {
 			Uptime:       float64(uptime.PassedChecks) / float64(uptime.TotalChecks),
 		})
 	}
+	eng.RUnlockUptime()
 
 	WriteJSON(w, http.StatusOK, s)
 }