diff --git a/drone-black-box/main.go b/drone-black-box/main.go
index 00cd28c..db5c146 100644
--- a/drone-black-box/main.go
+++ b/drone-black-box/main.go
@@ -131,6 +131,8 @@ func main() {
 		slog.Warn("Failed to set busy timeout", "error", err)
 	}
 
+	db.SetMaxOpenConns(1)
+
 	// Create table
 	createTableSQL := `CREATE TABLE IF NOT EXISTS drone_events (
 		id INTEGER PRIMARY KEY AUTOINCREMENT,
diff --git a/ilp-rest-service/src/main/java/io/github/js0ny/ilp_coursework/service/TelemetryService.java b/ilp-rest-service/src/main/java/io/github/js0ny/ilp_coursework/service/TelemetryService.java
index 1e8e61a..33cfc24 100644
--- a/ilp-rest-service/src/main/java/io/github/js0ny/ilp_coursework/service/TelemetryService.java
+++ b/ilp-rest-service/src/main/java/io/github/js0ny/ilp_coursework/service/TelemetryService.java
@@ -53,6 +53,7 @@ public class TelemetryService {
         CompletableFuture.runAsync(() -> {
             try {
                 String json = mapper.writeValueAsString(event);
+                System.out.println("[INFO] Sending telemetry event: " + json);
                 var request = java.net.http.HttpRequest.newBuilder()
                         .uri(java.net.URI.create(BLACKBOX_URL + "/ingest"))
                         .header("Content-Type", "application/json")