diff --git a/.changeset/openapi-nullable-recursion.md b/.changeset/openapi-nullable-recursion.md
new file mode 100644
index 000000000..367166228
--- /dev/null
+++ b/.changeset/openapi-nullable-recursion.md
@@ -0,0 +1,6 @@
+---
+"@gitbook/react-openapi": patch
+"gitbook": patch
+---
+
+Fix OpenAPI schemas that reference themselves through a nullable union rendering forever when expanded, which crashed PDF exports.