diff --git a/KisaniCal/Analytics/AnalyticsService.swift b/KisaniCal/Analytics/AnalyticsService.swift
index 5cc39f4..decc80e 100644
--- a/KisaniCal/Analytics/AnalyticsService.swift
+++ b/KisaniCal/Analytics/AnalyticsService.swift
@@ -36,7 +36,7 @@ final class AnalyticsService: ObservableObject {
         var healthByDate: [String: RawHealthDay] = [:]   // HealthKit reference
 
         init() {}
-        init(vm: WorkoutViewModel) {
+        @MainActor init(vm: WorkoutViewModel) {
             self.logByDate = Dictionary(vm.history.map { ($0.date, $0) }, uniquingKeysWith: { a, _ in a })
             self.workoutDates = Set(vm.workoutDates)
             self.scheduledWeekdays = Set(vm.schedule.keys)