diff --git a/.changeset/cuddly-years-smile.md b/.changeset/cuddly-years-smile.md
new file mode 100644
index 0000000..398938f
--- /dev/null
+++ b/.changeset/cuddly-years-smile.md
@@ -0,0 +1,9 @@
+---
+"@vivliostyle/theme-academic": major
+"@vivliostyle/theme-bunko": major
+"@vivliostyle/theme-gutenberg": major
+"@vivliostyle/theme-slide": major
+"@vivliostyle/theme-techbook": major
+---
+
+Update @vivliostyle/theme-base to v2.0.0