diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1bf51951..1da18a9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,10 +21,11 @@ jobs:
       matrix:
         python-version:
           - "3.8"
-          ##- "3.9"
-          ##- "3.10"
+          - "3.9"
+          - "3.10"
           - "3.11"
-      fail-fast: true
+          - "3.12"
+      fail-fast: false
 
     steps:
       - name: checkout
@@ -41,11 +42,14 @@ jobs:
 
           # For Fortran extensions
           sudo apt install -y --no-install-recommends \
-            python3-dev gfortran liblapack-dev meson
+            python3-dev gfortran liblapack-dev ninja-build
 
           sudo apt install -y --no-install-recommends \
             lammps quantum-espresso
 
+          # The meson Ubuntu package is outdated, so install via pip.
+          pip install meson
+
           pip install -e .
           pip install -r requirements_optional.txt
           pip install -r requirements_test.txt