diff --git a/cove_oc4ids/views.py b/cove_oc4ids/views.py
index 2b75059..a078ba5 100644
--- a/cove_oc4ids/views.py
+++ b/cove_oc4ids/views.py
@@ -1,6 +1,7 @@
 import json
 import logging
 from decimal import Decimal
+import re
 
 from cove.views import cove_web_input_error, explore_data_context
 from django.conf import settings
@@ -88,6 +89,13 @@ def explore_oc4ids(request, pk):
         db_data.rendered = True
     db_data.save()
 
+    for path_string, codelist_info in context["additional_open_codelist_values"].items():
+        if codelist_info["codelist_url"].startswith(schema_oc4ids.codelists):
+            codelist_info["codelist_url"] = (
+                "https://standard.open-contracting.org/infrastructure/latest/en/reference/codelists/#"
+                + re.sub(r"([A-Z])", r"\1", codelist_info["codelist"].split(".")[0]).lower()
+            )
+
     template = "cove_oc4ids/explore.html"
 
     return render(request, template, context)
diff --git a/requirements.txt b/requirements.txt
index b179f75..92c2310 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,8 +38,6 @@ django-bootstrap3==15.0.0
     # via
     #   -r requirements.in
     #   libcoveweb
-django-environ==0.6.0
-    # via libcoveweb
 et-xmlfile==1.1.0
     # via openpyxl
 flattentool==0.24.0
@@ -70,7 +68,7 @@ libcoveoc4ids[perf]==0.4.2
     # via -r requirements.in
 libcoveocds==0.11.0
     # via libcoveoc4ids
-libcoveweb==0.26.0
+libcoveweb==0.30.1
     # via -r requirements.in
 lxml==4.9.1
     # via flattentool
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 33ef3c5..b61603b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -73,10 +73,6 @@ django-bootstrap3==15.0.0
     # via
     #   -r requirements.txt
     #   libcoveweb
-django-environ==0.6.0
-    # via
-    #   -r requirements.txt
-    #   libcoveweb
 docopt==0.6.2
     # via coveralls
 et-xmlfile==1.1.0
@@ -138,7 +134,7 @@ libcoveocds==0.11.0
     # via
     #   -r requirements.txt
     #   libcoveoc4ids
-libcoveweb==0.26.0
+libcoveweb==0.30.1
     # via -r requirements.txt
 libsass==0.21.0
     # via -r requirements_dev.in
diff --git a/tests/fixtures/codelists.json b/tests/fixtures/codelists.json
new file mode 100644
index 0000000..3e0bada
--- /dev/null
+++ b/tests/fixtures/codelists.json
@@ -0,0 +1,24 @@
+{
+  "version": "0.9",
+  "uri": "https://standard.open-contracting.org/infrastructure/0.9/en/_static/example.json",
+  "publishedDate": "2018-12-10T15:53:00Z",
+  "publisher": {
+    "name": "Open Data Services Co-operative Limited",
+    "scheme": "GB-COH",
+    "uid": "9506232",
+    "uri": "http://data.companieshouse.gov.uk/doc/company/09506232"
+  },
+  "license": "http://opendatacommons.org/licenses/pddl/1.0/",
+  "publicationPolicy": "https://standard.open-contracting.org/1.1/en/implementation/publication_policy/",
+  "projects": [
+    {
+      "id": "proj1",
+      "status": "Bad news captain",
+      "sector": [
+        "little square buildings",
+        "pointy roofs"
+      ],
+      "type": "shiny and new"
+    }
+  ]
+}
diff --git a/tests/test_basic.py b/tests/test_basic.py
index 83cd72c..95bca32 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -1,3 +1,4 @@
+import os
 import pytest
 from cove.input.models import SuppliedData
 from django.core.files.base import ContentFile
@@ -21,3 +22,27 @@ def test_explore_page(client, json_data):
     data.current_app = "cove_oc4ids"
     resp = client.get(data.get_absolute_url())
     assert resp.status_code == 200
+
+
+
+
+@pytest.mark.django_db
+def test_codelist_url_extension_codelists(client):
+    file_name = os.path.join(
+        "tests",
+        "fixtures",
+        "codelists.json",
+    )
+    with open(os.path.join(file_name)) as fp:
+        user_data = fp.read()
+    data = SuppliedData.objects.create()
+    data.original_file.save("test.json", ContentFile(user_data))
+    data.current_app = "cove_oc4ids"
+    resp = client.get(data.get_absolute_url())
+
+    assert resp.status_code == 200
+    assert len(resp.context["additional_open_codelist_values"]) == 1
+    assert (
+        resp.context["additional_open_codelist_values"]["projects/sector"]["codelist_url"]
+        == "https://standard.open-contracting.org/infrastructure/latest/en/reference/codelists/#projectsector"
+    )