diff --git a/.github/workflows/tables.yml b/.github/workflows/tables.yml
new file mode 100644
index 0000000..c7d0c29
--- /dev/null
+++ b/.github/workflows/tables.yml
@@ -0,0 +1,46 @@
+# .github/workflows/tables.yml
+name: test-and-tables
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+      - run: pip install -r requirements.txt
+      - run: python -m pytest -q tests
+
+  tables:
+    needs: test
+    if: github.event_name != 'pull_request'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+          cache: pip
+      - run: pip install -r requirements.txt
+      - run: python scripts/generate_tables.py
+      - name: Commit regenerated tables if changed
+        run: |
+          git config user.name  "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add tables
+          if git diff --cached --quiet; then
+            echo "Tables unchanged."
+          else
+            git commit -m "Regenerate tables [skip ci]"
+            git push
+          fi
diff --git a/requirements.txt b/requirements.txt
index f01ac91..71e61c5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numpy>=2.0
-scipy>=1.11
-pandas>=2.0
+numpy==2.4.4
+scipy==1.17.1
+pandas==3.0.2
 pytest>=7
diff --git a/scripts/generate_tables.py b/scripts/generate_tables.py
index 00ec419..1199cab 100644
--- a/scripts/generate_tables.py
+++ b/scripts/generate_tables.py
@@ -38,7 +38,7 @@ def to_md(df: pd.DataFrame, pct_cols=None, decimals=2) -> str:
 
 
 def save(name, df, pct_cols=None, note=""):
-    df.to_csv(os.path.join(OUT, name + ".csv"))
+    df.round(6).to_csv(os.path.join(OUT, name + ".csv"))  # rounded to avoid float-noise diffs
     with open(os.path.join(OUT, name + ".md"), "w") as f:
         f.write(f"# {name}\n\n{note}\n\n" + to_md(df, pct_cols) + "\n")
     print("wrote", name)