diff --git a/openflexure_microscope/api/default_extensions/zip_builder.py b/openflexure_microscope/api/default_extensions/zip_builder.py
index 483d694e..26591a1f 100644
--- a/openflexure_microscope/api/default_extensions/zip_builder.py
+++ b/openflexure_microscope/api/default_extensions/zip_builder.py
@@ -16,7 +16,7 @@ import logging
 
 from openflexure_microscope.common.flask_labthings.find import find_device
 from openflexure_microscope.common.flask_labthings.resource import Resource
-from openflexure_microscope.common.flask_labthings.plugins import BasePlugin
+from openflexure_microscope.common.flask_labthings.extensions import BaseExtension
 
 
 class ZipManager:
@@ -138,11 +138,11 @@ class ZipGetterAPIView(Resource):
         return jsonify({"return": session_id})
 
 
-zip_plugin_v2 = BasePlugin("zip_builder")
+zip_extension_v2 = BaseExtension("zip_builder")
 
-zip_plugin_v2.add_view(ZipGetterAPIView, "/get/<string:session_id>")
-zip_plugin_v2.add_view(ZipListAPIView, "/get")
+zip_extension_v2.add_view(ZipGetterAPIView, "/get/<string:session_id>")
+zip_extension_v2.add_view(ZipListAPIView, "/get")
 
-zip_plugin_v2.add_view(ZipBuilderAPIView, "/build")
-zip_plugin_v2.register_action(ZipBuilderAPIView)
+zip_extension_v2.add_view(ZipBuilderAPIView, "/build")
+zip_extension_v2.register_action(ZipBuilderAPIView)
 
diff --git a/openflexure_microscope/api/utilities.py b/openflexure_microscope/api/utilities.py
index 0bc4b612..393bd736 100644
--- a/openflexure_microscope/api/utilities.py
+++ b/openflexure_microscope/api/utilities.py
@@ -124,6 +124,7 @@ def init_default_extensions(extension_path):
 _DEFAULT_extension_INIT = """
 from openflexure_microscope.api.default_extensions.autofocus import autofocus_extension_v2
 from openflexure_microscope.api.default_extensions.scan import scan_extension_v2
+from openflexure_microscope.api.default_extensions.zip_builder import zip_extension_v2
 
-__extensions__ = [autofocus_extension_v2, scan_extension_v2]
+__extensions__ = [autofocus_extension_v2, scan_extension_v2, zip_extension_v2]
 """