diff --git a/README.md b/README.md
index 7e77c77a92..3aedf4249a 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@
 | :------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | **Latest Release**         | [![PyPI version](https://badge.fury.io/py/linearmodels.svg)](https://badge.fury.io/py/linearmodels)                                                                                                                                                      |
 | **Continuous Integration** | [![Build Status](https://dev.azure.com/kevinksheppard/kevinksheppard/_apis/build/status/bashtage.linearmodels?branchName=main)](https://dev.azure.com/kevinksheppard/kevinksheppard/_build/latest?definitionId=2&branchName=main)                        |
-|                            | [![Build status](https://ci.appveyor.com/api/projects/status/7768doy6wrdunmdt/branch/main?svg=true)](https://ci.appveyor.com/project/bashtage/linearmodels/branch/main)                                                                                  |
 | **Coverage**               | [![codecov](https://codecov.io/gh/bashtage/linearmodels/branch/main/graph/badge.svg)](https://codecov.io/gh/bashtage/linearmodels)                                                                                                                       |
 | **Code Quality**           | [![Codacy Badge](https://api.codacy.com/project/badge/Grade/745a24a69cb2466b95df6a53c83892de)](https://www.codacy.com/manual/bashtage/linearmodels?utm_source=github.com&utm_medium=referral&utm_content=bashtage/linearmodels&utm_campaign=Badge_Grade) |
 |                            | [![codebeat badge](https://codebeat.co/badges/aaae2fb4-72b5-4a66-97cd-77b93488f243)](https://codebeat.co/projects/github-com-bashtage-linearmodels-main)                                                                                                 |
@@ -133,12 +132,14 @@ regression. Currently only the single variable IV estimators are polished.
 ### Running
 
 -   Python 3.9+
--   NumPy (1.19+)
+-   NumPy (1.22+)
 -   SciPy (1.5+)
--   pandas (1.1+)
+-   pandas (1.3+)
 -   statsmodels (0.12+)
+-   formulaic (0.6.5+)
 -   xarray (0.16+, optional)
--   Cython (0.29.34+, optional)
+-   Cython (0.29.37+, optional)
+
 
 ### Testing
 
diff --git a/ci/azure_template_posix.yml b/ci/azure_template_posix.yml
index 060439c941..a1b5d26378 100644
--- a/ci/azure_template_posix.yml
+++ b/ci/azure_template_posix.yml
@@ -16,32 +16,32 @@ jobs:
     vmImage: ${{ parameters.vmImage }}
   strategy:
     matrix:
-      python39_legacy:
+      python39_minimums:
         python.version: '3.9'
-        NUMPY: 1.19.0
+        NUMPY: 1.22.0
         SCIPY: 1.5.0
-        PANDAS: 1.1.0
+        PANDAS: 1.3.0
         STATSMODELS: 0.12.0
-        XARRAY: 0.16.0
+        XARRAY: 0.21.0
         FORMULAIC: 0.6.5
         test.install: true
       python39_mid:
         python.version: '3.9'
-        NUMPY: 1.20.0
+        NUMPY: 1.23.0
         SCIPY: 1.6.0
-        PANDAS: 1.2.0
-        STATSMODELS: 0.12.0
-        XARRAY: 0.18.0
+        PANDAS: 1.4.0
+        STATSMODELS: 0.13.0
+        XARRAY: 2022.6.0
         XXHASH: true
         FORMULAIC: 0.6.5
         test.install: true
       python39_recent:
         python.version: '3.9'
-        NUMPY: 1.21.0
+        NUMPY: 1.24.0
         SCIPY: 1.7.0
-        PANDAS: 1.3.0
+        PANDAS: 1.5.0
         STATSMODELS: 0.13.0
-        XARRAY: 0.20.0
+        XARRAY: 2022.12.0
         FORMULAIC: 0.6.5
         test.install: true
       python310_no_cython:
@@ -49,11 +49,11 @@ jobs:
         LM_NO_BINARY: 1
       python310_recent:
         python.version: '3.10'
-        NUMPY: 1.22.0
-        SCIPY: 1.8.0
-        PANDAS: 1.5.0
-        STATSMODELS: 0.13.0
-        XARRAY: 22.0
+        NUMPY: 1.24.0
+        SCIPY: 1.9.0
+        PANDAS: 2.0.0
+        STATSMODELS: 0.14.0
+        XARRAY: 2023.4.0
       python310_latest:
         python.version: '3.10'
         FORMULAIC: 1.0.1
@@ -134,6 +134,9 @@ jobs:
 
   - script: |
       echo "Testing pip-pre"
+      if [[ ${COVERAGE} == "true" ]]; then
+        export COVERAGE_OPTS="--cov-config .coveragerc --cov=linearmodels --cov-report xml:coverage.xml --cov-report term"
+      fi
       echo pytest -m "${PYTEST_PATTERN}" --junitxml=junit/test-results.xml -n auto --durations=25 ${COVERAGE_OPTS} linearmodels/tests
       pytest -m "${PYTEST_PATTERN}" --junitxml=junit/test-results.xml -n auto --durations=25 ${COVERAGE_OPTS} linearmodels/tests
     displayName: 'Run tests (pip pre)'
diff --git a/requirements.txt b/requirements.txt
index a23249631c..880fdf49ab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,9 @@
-numpy>=1.19.0
-pandas>=1.1.0
+numpy>=1.22.0
+pandas>=1.3.0
 scipy>=1.5.0
 statsmodels>=0.12.0
 mypy_extensions>=0.4
-Cython>=0.29.34
+Cython>=0.29.37
 pyhdfe>=0.1
 formulaic>=0.6.5
 # versioning