diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index fc5a41e..5067fd4 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -7,14 +7,6 @@
 
 jobs:
 
-    - template: etc/ci/azure-posix.yml
-      parameters:
-          job_name: ubuntu18_cpython
-          image_name: ubuntu-18.04
-          python_versions: ['3.7', '3.8', '3.9', '3.10', '3.11']
-          test_suites:
-              all: venv/bin/pytest -n 2 -vvs
-
     - template: etc/ci/azure-posix.yml
       parameters:
           job_name: ubuntu20_cpython
@@ -31,14 +23,6 @@ jobs:
           test_suites:
               all: venv/bin/pytest -n 2 -vvs
 
-    - template: etc/ci/azure-posix.yml
-      parameters:
-          job_name: macos1015_cpython
-          image_name: macos-10.15
-          python_versions: ['3.7', '3.8', '3.9', '3.10', '3.11']
-          test_suites:
-              all: venv/bin/pytest -n 2 -vvs
-
     - template: etc/ci/azure-posix.yml
       parameters:
           job_name: macos11_cpython
diff --git a/setup.cfg b/setup.cfg
index 0012304..cc9c1ed 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -67,7 +67,7 @@ testing =
     isort
 
 docs =
-    Sphinx >= 3.3.1
+    Sphinx == 6.2.1
     sphinx-rtd-theme >= 0.5.0
     sphinxcontrib-apidoc >= 0.3.0
     doc8 >= 0.8.1