diff --git a/otc_metadata/templates/doc_requirements.txt.j2 b/otc_metadata/templates/doc_requirements.txt.j2
index ea0c4dee..df4f8049 100644
--- a/otc_metadata/templates/doc_requirements.txt.j2
+++ b/otc_metadata/templates/doc_requirements.txt.j2
@@ -1,5 +1,11 @@
 sphinx>=2.0.0,!=2.1.0 # BSD
+{% if target_environment == 'public' %}
+otcdocstheme<1.0.0 # Apache-2.0
+{% elif target_environment == 'internal' %}
 otcdocstheme # Apache-2.0
+{% else %}
+otcdocstheme # Apache-2.0
+{% endif %}
 # releasenotes
 reno>=3.1.0 # Apache-2.0
 
diff --git a/tools/generate_doc_confpy.py b/tools/generate_doc_confpy.py
index 2e52d089..6939f894 100644
--- a/tools/generate_doc_confpy.py
+++ b/tools/generate_doc_confpy.py
@@ -237,6 +237,8 @@ def process_repositories(args, service):
                 doc["type"] = "dev-guide"
             context["docs"].append(doc)
 
+        context["target_environment"] = args.target_environment
+
         tox_ini_content = tox_ini_template.render(**context)
         tox_ini_path = pathlib.Path(copy_to, "tox.ini")
         doc_requirements_content = doc_requirements_template.render(**context)
@@ -313,6 +315,7 @@ def main():
     parser.add_argument(
         "--target-environment",
         required=True,
+        choices=["internal", "public"],
         help="Environment to be used as a source",
     )
     parser.add_argument("--service-type", help="Service to update")