diff --git a/girder_worker/girder_plugin/__init__.py b/girder_worker/girder_plugin/__init__.py
index 4f6f2802..c1e7dd4c 100644
--- a/girder_worker/girder_plugin/__init__.py
+++ b/girder_worker/girder_plugin/__init__.py
@@ -27,52 +27,37 @@
 import logging
 from pathlib import Path
 
-import girder  # noqa
+from girder import events
+from girder.constants import AccessType
+from girder.plugin import getPlugin, GirderPlugin, registerPluginStaticContent
+from girder_jobs.models.job import Job
 
-logger = logging.getLogger(__name__)
-
-# Detect if girder>=3 is installed by checking an import that was added in 3.0.
-_isGirder3 = False
-try:
-    from girder.plugin import getPlugin, GirderPlugin, registerPluginStaticContent
-    _isGirder3 = True
-except ImportError:
-    logger.info('Girder 2.x is detected skipping incompatible entrypoint definition.')
+from .api.worker import Worker
+from . import event_handlers
 
+logger = logging.getLogger(__name__)
 
-# If girder>=3 is installed, it is safe to continue defining the plugin class, otherwise
-# just define a dummy class to prevent error messages from propagating.
-if _isGirder3:
-    from girder import events
-    from girder.constants import AccessType
-    from girder_jobs.models.job import Job
-
-    from .api.worker import Worker
-    from . import event_handlers
 
-    class WorkerPlugin(GirderPlugin):
-        DISPLAY_NAME = 'Worker'
+class WorkerPlugin(GirderPlugin):
+    DISPLAY_NAME = 'Worker'
 
-        def load(self, info):
-            getPlugin('jobs').load(info)
+    def load(self, info):
+        getPlugin('jobs').load(info)
 
-            info['apiRoot'].worker = Worker()
+        info['apiRoot'].worker = Worker()
 
-            registerPluginStaticContent(
-                plugin='worker',
-                js=['/girder-plugin-worker.umd.cjs'],
-                css=['/style.css'],
-                staticDir=Path(__file__).parent / 'web_client' / 'dist',
-                tree=info['serverRoot'],
-            )
+        registerPluginStaticContent(
+            plugin='worker',
+            js=['/girder-plugin-worker.umd.cjs'],
+            css=['/style.css'],
+            staticDir=Path(__file__).parent / 'web_client' / 'dist',
+            tree=info['serverRoot'],
+        )
 
-            events.bind('jobs.schedule', 'worker', event_handlers.schedule)
-            events.bind('jobs.status.validate', 'worker', event_handlers.validateJobStatus)
-            events.bind('jobs.status.validTransitions', 'worker', event_handlers.validTransitions)
-            events.bind('jobs.cancel', 'worker', event_handlers.cancel)
-            events.bind('model.job.save.after', 'worker', event_handlers.attachJobInfoSpec)
-            events.bind('model.job.save', 'worker', event_handlers.attachParentJob)
-            Job().exposeFields(AccessType.SITE_ADMIN, {'celeryTaskId', 'celeryQueue'})
-else:
-    class WorkerPlugin:
-        pass
+        events.bind('jobs.schedule', 'worker', event_handlers.schedule)
+        events.bind('jobs.status.validate', 'worker', event_handlers.validateJobStatus)
+        events.bind('jobs.status.validTransitions', 'worker', event_handlers.validTransitions)
+        events.bind('jobs.cancel', 'worker', event_handlers.cancel)
+        events.bind('model.job.save.after', 'worker', event_handlers.attachJobInfoSpec)
+        events.bind('model.job.save', 'worker', event_handlers.attachParentJob)
+        Job().exposeFields(AccessType.SITE_ADMIN, {'celeryTaskId', 'celeryQueue'})
diff --git a/girder_worker/girder_plugin/web_client/vite.config.ts b/girder_worker/girder_plugin/web_client/vite.config.ts
index ef71afae..4e8f7040 100644
--- a/girder_worker/girder_plugin/web_client/vite.config.ts
+++ b/girder_worker/girder_plugin/web_client/vite.config.ts
@@ -28,9 +28,5 @@ export default defineConfig({
       name: 'GirderPluginWorker',
       fileName: 'girder-plugin-worker',
     },
-  },
-  define: {
-    __BUILD_TIMESTAMP__: `${+new Date()}`,
-    'process.env': {},  // for legacy Vue 2
-  },
+  }
 });
diff --git a/requirements-dev.in b/requirements-dev.in
index f27839a5..6eed2ec7 100644
--- a/requirements-dev.in
+++ b/requirements-dev.in
@@ -1,6 +1,6 @@
--e git+https://github.com/girder/girder.git@master#egg=girder
--e git+https://github.com/girder/girder.git@master#egg=girder-jobs&subdirectory=plugins/jobs
--e git+https://github.com/girder/girder.git@master#egg=pytest-girder&subdirectory=pytest_girder
+-e git+https://github.com/girder/girder.git@v4-integration#egg=girder
+-e git+https://github.com/girder/girder.git@v4-integration#egg=girder-jobs&subdirectory=plugins/jobs
+-e git+https://github.com/girder/girder.git@v4-integration#egg=pytest-girder&subdirectory=pytest_girder
 coverage
 coveralls
 flake8
diff --git a/requirements.txt b/requirements.txt
index 26bcce9c..165f6cce 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,14 +4,14 @@
 #
 #    pip-compile --output-file=requirements.txt requirements-dev.in requirements.in
 #
--e git+https://github.com/girder/girder.git@master#egg=girder
+-e git+https://github.com/girder/girder.git@v4-integration#egg=girder
     # via
     #   -r requirements-dev.in
     #   girder-jobs
     #   pytest-girder
--e git+https://github.com/girder/girder.git@master#egg=girder-jobs&subdirectory=plugins/jobs
+-e git+https://github.com/girder/girder.git@v4-integration#egg=girder-jobs&subdirectory=plugins/jobs
     # via -r requirements-dev.in
--e git+https://github.com/girder/girder.git@master#egg=pytest-girder&subdirectory=pytest_girder
+-e git+https://github.com/girder/girder.git@v4-integration#egg=pytest-girder&subdirectory=pytest_girder
     # via -r requirements-dev.in
 alabaster==0.7.13
     # via sphinx
diff --git a/setup.py b/setup.py
index faf89d88..f09fee33 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,7 @@ def run(self, *args, **kwargs):
     install_reqs = f.readlines()
 
 extras_require = {}
-extras_require['girder'] = ['girder>=3.0.1', 'girder-jobs>=3.0.1']
+extras_require['girder'] = ['girder>=5', 'girder-jobs>=5']
 
 # perform the install
 setuptools.setup(