diff --git a/docs/architecture/c4/l2-containers.puml b/docs/architecture/c4/l2-containers.puml
index 96741ac8..02167cdb 100644
--- a/docs/architecture/c4/l2-containers.puml
+++ b/docs/architecture/c4/l2-containers.puml
@@ -25,8 +25,8 @@ System_Boundary(observability, "Observability Stack (/opt/familienarchiv/docker-
     Container(promtail, "Promtail", "grafana/promtail:3.4.2", "Ships Docker container logs to Loki via Docker SD.")
     Container(tempo, "Tempo", "grafana/tempo:2.7.2", "Distributed trace storage. OTLP gRPC receiver on port 4317 (archiv-net). Grafana queries traces on port 3200 (obs-net). All ports internal only.")
     Container(grafana, "Grafana", "grafana/grafana-oss:11.6.1", "Unified observability UI — dashboards, logs, traces. Datasources (Prometheus, Loki, Tempo) and three dashboards are auto-provisioned.")
-    Container(glitchtip, "GlitchTip", "glitchtip/glitchtip:v4", "Sentry-compatible error tracker — web process. Receives frontend + backend error events, groups by fingerprint, provides issue UI with stack traces.")
-    Container(obs_glitchtip_worker, "GlitchTip Worker", "glitchtip/glitchtip:v4", "Celery + beat worker — async event ingestion, notifications, cleanup.")
+    Container(glitchtip, "GlitchTip", "glitchtip/glitchtip:6.1.6", "Sentry-compatible error tracker — web process. Receives frontend + backend error events, groups by fingerprint, provides issue UI with stack traces.")
+    Container(obs_glitchtip_worker, "GlitchTip Worker", "glitchtip/glitchtip:6.1.6", "Celery + beat worker — async event ingestion, notifications, cleanup.")
     Container(obs_redis, "Redis", "redis:7-alpine", "Celery task queue for GlitchTip async workers.")
 }