diff --git a/Sources/App/configure.swift b/Sources/App/configure.swift
index 374012c..1ee1cab 100755
--- a/Sources/App/configure.swift
+++ b/Sources/App/configure.swift
@@ -118,10 +118,13 @@ private func migrateMetric<T>(_ id: String, containing type: T.Type, in folder:
     // TODO: Write values back to disk
     let observer = MetricObserver(logFileFolder: folder, logMetricId: "sesame.migration")
     let metric: Metric<T> = observer.addMetric(id: id)
+    private let semaphore = DispatchSemaphore(value: 0)
     Task {
         try await metric.update(all)
         print("Saved all values for metric \(id)")
+        semaphore.signal()
     }
+    semaphore.wait()
     print("Finished metric \(id)")
 }