diff --git a/docs/images/03-pivot-table-airborne.png b/docs/images/03-pivot_table_airborne.png
similarity index 100%
rename from docs/images/03-pivot-table-airborne.png
rename to docs/images/03-pivot_table_airborne.png
diff --git a/docs/images/03-pivot-table-editor.png b/docs/images/03-pivot_table_editor.png
similarity index 100%
rename from docs/images/03-pivot-table-editor.png
rename to docs/images/03-pivot_table_editor.png
diff --git a/docs/images/03-pivot-table-names.png b/docs/images/03-pivot_table_names.png
similarity index 100%
rename from docs/images/03-pivot-table-names.png
rename to docs/images/03-pivot_table_names.png