diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8be467c11..40476d645 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## Unreleased
+
+- Fixed document buffer size. Node.js 18+ allow max 1 GiB.
+
 ## 0.3.0-beta.4 - 2022-12-17
 
 - Minimal supported version Node.js 14 LTS
diff --git a/src/OutputDocument.js b/src/OutputDocument.js
index 1569cb4bf..f1c584e93 100644
--- a/src/OutputDocument.js
+++ b/src/OutputDocument.js
@@ -4,7 +4,7 @@ class OutputDocument {
 	 * @param {Promise<object>} pdfDocumentPromise
 	 */
 	constructor(pdfDocumentPromise) {
-		this.bufferSize = 9007199254740991;
+		this.bufferSize = 1073741824;
 		this.pdfDocumentPromise = pdfDocumentPromise;
 		this.bufferPromise = null;
 	}