diff --git a/acmc/omop.py b/acmc/omop.py
index 9f947a0efc8e7e9a725c6f2a62d870aa5f804824..baf6e7f4a226017039e0b56bafb5a400c0bd4c90 100644
--- a/acmc/omop.py
+++ b/acmc/omop.py
@@ -26,17 +26,17 @@ vocabularies = {
     "url": "https://athena.ohdsi.org/vocabulary/list",
     "version": "",
     "vocabularies": [
-        {"id": 1, "name": "SNOMED"},
-        {"id": 2, "name": "ICD9CM"},
-        {"id": 17, "name": "Readv2"},
-        {"id": 21, "name": "ATC"},
-        {"id": 55, "name": "OPCS4"},
-        {"id": 57, "name": "HES Specialty"},
-        {"id": 70, "name": "ICD10CM"},
-        {"id": 75, "name": "dm+d"},
-        {"id": 144, "name": "UK Biobank"},
-        {"id": 154, "name": "NHS Ethnic Category"},
-        {"id": 155, "name": "NHS Place of Service"},
+        {"id": 1, "name": "SNOMED"}, # No license required
+        {"id": 2, "name": "ICD9CM"}, # No license required
+        {"id": 17, "name": "Readv2"}, # No license required
+        {"id": 21, "name": "ATC"}, # No license required
+        {"id": 55, "name": "OPCS4"}, # No license required
+        {"id": 57, "name": "HES Specialty"}, # No license required
+        {"id": 70, "name": "ICD10CM"}, # No license required
+        {"id": 75, "name": "dm+d"}, # No license required
+        {"id": 144, "name": "UK Biobank"}, # No license required
+        {"id": 154, "name": "NHS Ethnic Category"}, # No license required
+        {"id": 155, "name": "NHS Place of Service"}, # No license required
     ],
     "tables": [],
 }