diff --git a/requirements.txt b/requirements.txt
index 6832883a..fca6c1ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.12
 Babel==2.9.1 
-certifi==2019.11.28
+certifi==2022.12.7
 chardet==3.0.4
 commonmark==0.9.1
 docutils==0.16
diff --git a/src/assignments/tech-jobs-mvc.rst b/src/assignments/tech-jobs-mvc.rst
index 2fff9175..e11b5d7c 100644
--- a/src/assignments/tech-jobs-mvc.rst
+++ b/src/assignments/tech-jobs-mvc.rst
@@ -318,7 +318,7 @@ open the relevant file.
    :alt: TechJobs MVC TODO list.
 
 As you work on your tasks, refer to the
-`demo app <https://lc-java-3-demo.herokuapp.com/>`__.
+`demo app <https://java-techjobs-mvc.launchcodetechnicaltraining.org/>`__.
 
 2) Complete the List Views
 ---------------------------
@@ -422,7 +422,7 @@ Sanity Check
 
 At this point, all autograding tests should be passing. To be sure, right-click on the ``org.launchcode.techjobs.mvc`` package in ``src/test/java`` and select *Run tests in...* If any test fails, evaluate the failure/error message and go back to fix your code.
 
-You might also want to check your app's behavior against that of `our demo app <https://quiet-ravine-03237.herokuapp.com/>`_.
+You might also want to check your app's behavior against that of `our demo app <https://java-techjobs-mvc.launchcodetechnicaltraining.org/>`_.
 
 How to Submit
 --------------
diff --git a/src/assignments/tech-jobs-persistent.rst b/src/assignments/tech-jobs-persistent.rst
index 17c57bbf..b10fb5eb 100644
--- a/src/assignments/tech-jobs-persistent.rst
+++ b/src/assignments/tech-jobs-persistent.rst
@@ -255,7 +255,7 @@ and view them.
 
    When everything works, move on to Part 3 below.
 
-Throughout your work, refer to the `demo app <https://lc-java-4-demo.herokuapp.com/>`__ as needed.
+Throughout your work, refer to the `demo app <https://techjobs-persistent.launchcodetechnicaltraining.org/>`_ as needed.
 
 .. _tech-jobs-persistent-pt3: