diff --git a/docs/architecture.md b/docs/architecture.md
index 95672e6..753d80e 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -18,7 +18,7 @@ flowchart LR
   T -->|HTTP->HTTPS redirect| T
   T -->|ACME HTTP challenge| LE[Let's Encrypt ACME]
 
-  subgraph TraefikNet[Docker network: traefik (172.21.0.0/16)]
+  subgraph TraefikNet["Docker network: traefik (172.21.0.0 slash 16)"]
     A[Authelia]
     CS[CrowdSec LAPI]
     EP[Error Pages]