diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 2ab8538..a8af6c8 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -38,7 +38,8 @@ on:
 
 jobs:
   benchmark:
-    runs-on: ubuntu-latest
+    # Keep in sync with the Ubuntu version CPython's CI runs on
+    runs-on: ubuntu-26.04
     
     steps:
     - name: Checkout memory tracker
diff --git a/.github/workflows/daily-benchmark.yml b/.github/workflows/daily-benchmark.yml
index 30a711a..7a78779 100644
--- a/.github/workflows/daily-benchmark.yml
+++ b/.github/workflows/daily-benchmark.yml
@@ -29,7 +29,8 @@ on:
 
 jobs:
   benchmark-builds:
-    runs-on: ubuntu-latest
+    # Keep in sync with the Ubuntu version CPython's CI runs on
+    runs-on: ubuntu-26.04
     strategy:
       matrix:
         build_config: