diff --git a/.changeset/chatty-waves-invite.md b/.changeset/chatty-waves-invite.md
new file mode 100644
index 00000000..62d60dca
--- /dev/null
+++ b/.changeset/chatty-waves-invite.md
@@ -0,0 +1,5 @@
+---
+'markdown-to-jsx': patch
+---
+
+Handle `class` attribute from arbitrary HTML properly to avoid React warnings.