diff --git a/nethvoice-proxy/metadata.json b/nethvoice-proxy/metadata.json
index 5e20c11..559550c 100644
--- a/nethvoice-proxy/metadata.json
+++ b/nethvoice-proxy/metadata.json
@@ -3,7 +3,7 @@
   "description": {
     "en": "NethVoice proxy module"
   },
-  "categories": [],
+  "categories": ["communication", "system_administration"],
   "authors": [
     {
       "name": "Nethesis",
diff --git a/nethvoice/metadata.json b/nethvoice/metadata.json
index 997ad91..5716395 100644
--- a/nethvoice/metadata.json
+++ b/nethvoice/metadata.json
@@ -4,7 +4,7 @@
     "en": "NethVoice Module",
     "it": "Modulo NethVoice"
   },
-  "categories": [],
+  "categories": ["communication"],
   "authors": [
     {
       "name": "Nethesis",