diff --git a/textproc/py-isbntools/Makefile b/textproc/py-isbntools/Makefile
index f7bd4a2e3ded..2f864c39add7 100644
--- a/textproc/py-isbntools/Makefile
+++ b/textproc/py-isbntools/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	isbntools
-PORTVERSION=	4.3.28
+PORTVERSION=	4.3.29
 CATEGORIES=	textproc python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
diff --git a/textproc/py-isbntools/distinfo b/textproc/py-isbntools/distinfo
index 4d05bb035c38..4f889d0a2e6e 100644
--- a/textproc/py-isbntools/distinfo
+++ b/textproc/py-isbntools/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1637073022
-SHA256 (isbntools-4.3.28.tar.gz) = 385ac886b3e9abb59bbffe5bad5489456fae416819f3453d8a9048e40eef9813
-SIZE (isbntools-4.3.28.tar.gz) = 39952
+TIMESTAMP = 1677771363
+SHA256 (isbntools-4.3.29.tar.gz) = 59e7eb8ca063b2241864166dca774fcbfb97ddd6ce5303ee91362753d6a8b90f
+SIZE (isbntools-4.3.29.tar.gz) = 33280