diff --git a/flask_app.py b/flask_app.py
index 6c06218e6..d8bf54e81 100644
--- a/flask_app.py
+++ b/flask_app.py
@@ -10,7 +10,13 @@
 # app setup
 smart_defaults = {
     'app_id': 'my_web_app',
-    'api_base': 'https://sb-fhir-stu3.smarthealthit.org/smartstu3/data',
+    # The CapabilityStatement being returned from the new test server,
+    # r4.smarthealthit.org, is currently missing a required field in the
+    # description of one of the search params. So you may see a
+    # 'Non-optional property "type"' error message when running this with
+    # the default config. We'll remove this message once that has been
+    # fixed and tested.
+    'api_base': 'https://r4.smarthealthit.org/',
     'redirect_uri': 'http://localhost:8000/fhir-app/',
 }
 
diff --git a/requirements_flask_app.txt b/requirements_flask_app.txt
index 008204a8f..91c6a41fc 100644
--- a/requirements_flask_app.txt
+++ b/requirements_flask_app.txt
@@ -1,8 +1,8 @@
-Beaker==1.10.0
-Flask==0.10.1
-Jinja2==2.11.3
-MarkupSafe==0.23
-Werkzeug==0.14.1
-isodate==0.5.1
-itsdangerous==0.24
-requests==2.7.0
+Beaker>=1.13.0
+Flask>=2.3.2
+Jinja2>=3.1.2
+MarkupSafe>=2.1.1
+Werkzeug>=2.3.3
+isodate>=0.6.1
+itsdangerous>=2.1.2
+requests>=2.22.0