diff --git a/TunnelKit/Sources/AppExtension/Transport/NWTCPConnectionState+Description.swift b/TunnelKit/Sources/AppExtension/Transport/NWTCPConnectionState+Description.swift
index 939477f..aad6801 100644
--- a/TunnelKit/Sources/AppExtension/Transport/NWTCPConnectionState+Description.swift
+++ b/TunnelKit/Sources/AppExtension/Transport/NWTCPConnectionState+Description.swift
@@ -48,6 +48,7 @@ extension NWTCPConnectionState: CustomStringConvertible {
         case .disconnected: return "disconnected"
         case .invalid: return "invalid"
         case .waiting: return "waiting"
+        @unknown default: return "???"
         }
     }
 }
diff --git a/TunnelKit/Sources/AppExtension/Transport/NWUDPSessionState+Description.swift b/TunnelKit/Sources/AppExtension/Transport/NWUDPSessionState+Description.swift
index f03a5a0..cc750b6 100644
--- a/TunnelKit/Sources/AppExtension/Transport/NWUDPSessionState+Description.swift
+++ b/TunnelKit/Sources/AppExtension/Transport/NWUDPSessionState+Description.swift
@@ -48,6 +48,7 @@ extension NWUDPSessionState: CustomStringConvertible {
         case .preparing: return "preparing"
         case .ready: return "ready"
         case .waiting: return "waiting"
+        @unknown default: return "???"
         }
     }
 }
diff --git a/TunnelKit/Sources/AppExtension/TunnelKitProvider.swift b/TunnelKit/Sources/AppExtension/TunnelKitProvider.swift
index 7f7bb70..60e1b29 100644
--- a/TunnelKit/Sources/AppExtension/TunnelKitProvider.swift
+++ b/TunnelKit/Sources/AppExtension/TunnelKitProvider.swift
@@ -627,6 +627,9 @@ extension TunnelKitProvider {
                 
             case .LZO:
                 return .lzo
+
+            default:
+                break
             }
         } else if let se = error as? SessionError {
             switch se {
diff --git a/TunnelKit/Sources/Core/Packet.swift b/TunnelKit/Sources/Core/Packet.swift
index b934f61..19cd4d2 100644
--- a/TunnelKit/Sources/Core/Packet.swift
+++ b/TunnelKit/Sources/Core/Packet.swift
@@ -156,6 +156,7 @@ extension PacketCode: CustomStringConvertible {
         case .hardResetServerV2:    return "HARD_RESET_SERVER_V2"
         case .dataV2:               return "DATA_V2"
         case .unknown:              return "UNKNOWN"
+        @unknown default:           return "UNKNOWN"
         }
     }
 }