diff --git a/spec-0000/SPEC0_versions.py b/spec-0000/SPEC0_versions.py
index ca2ad5cc..11ea0314 100644
--- a/spec-0000/SPEC0_versions.py
+++ b/spec-0000/SPEC0_versions.py
@@ -119,7 +119,14 @@ def get_release_dates(package, support_time=plus24):
 print("Saving Mermaid chart to chart.md")
 with open("chart.md", "w") as fh:
     fh.write(
-        """gantt
+        """---
+config:
+  gantt:
+    topAxis: true
+    gridLineStartPadding: 50
+  themeCSS: '.grid .tick text[dy="0em"] { transform: translateY(-4px); }'
+---
+gantt
 dateFormat YYYY-MM-DD
 axisFormat %m / %Y
 title Support Window"""
diff --git a/spec-0000/chart.md b/spec-0000/chart.md
index 3bb4832e..544d3963 100644
--- a/spec-0000/chart.md
+++ b/spec-0000/chart.md
@@ -1,3 +1,10 @@
+---
+config:
+  gantt:
+    topAxis: true
+    gridLineStartPadding: 50
+  themeCSS: '.grid .tick text[dy="0em"] { transform: translateY(-4px); }'
+---
 gantt
 dateFormat YYYY-MM-DD
 axisFormat %m / %Y