diff --git a/3.1/json/train-travel.json b/3.1/json/train-travel.json
index 997d0b8..28dd626 100644
--- a/3.1/json/train-travel.json
+++ b/3.1/json/train-travel.json
@@ -11,7 +11,8 @@
     },
     "license": {
       "name": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International",
-      "identifier": "CC-BY-NC-SA-4.0"
+      "identifier": "CC-BY-NC-SA-4.0",
+      "url": "https://github.com/bump-sh-examples/train-travel-api/blob/main/LICENSE_CC-BY-NC-SA-4.0"
     }
   },
   "x-topics": [
diff --git a/3.1/yaml/train-travel.yaml b/3.1/yaml/train-travel.yaml
index 04804a1..b37cc93 100644
--- a/3.1/yaml/train-travel.yaml
+++ b/3.1/yaml/train-travel.yaml
@@ -10,6 +10,7 @@ info:
   license:
     name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
     identifier: CC-BY-NC-SA-4.0
+    url: https://github.com/bump-sh-examples/train-travel-api/blob/main/LICENSE_CC-BY-NC-SA-4.0
 
 x-topics:
   - title: Getting started