diff --git a/.github/workflows/cpp.yml b/.github/workflows/cpp.yml
index c82e2482..bdf8e909 100644
--- a/.github/workflows/cpp.yml
+++ b/.github/workflows/cpp.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   cppcheck:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/golang.yml b/.github/workflows/golang.yml
index c542e54e..3b1cecb6 100644
--- a/.github/workflows/golang.yml
+++ b/.github/workflows/golang.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   gotest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         gover: ["1.15"]
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6561a2d7..48e8af8b 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   pypi:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index f364f304..ab0d9035 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   unittest:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         pyver: ["3.8", "3.9", "3.10", "3.11", "3.12"]
@@ -40,7 +40,7 @@ jobs:
       run: ./misc/memcached_server stopall
 
   benchmark:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         pyver: ["3.8", "3.9", "3.10", "3.11", "3.12"]
diff --git a/setup.py b/setup.py
index 1d3b789e..21d0e801 100644
--- a/setup.py
+++ b/setup.py
@@ -100,7 +100,7 @@ def find_version(*file_paths):
         "Topic :: Software Development :: Libraries",
     ],
     # Support for the basestring type is new in Cython 0.20.
-    setup_requires=["Cython >= 0.20"],
+    setup_requires=["Cython >= 0.20, < 3.1"],
     ext_modules=[
         Extension(
             "libmc._client",