diff --git a/python-nbformat.changes b/python-nbformat.changes
index d6127a1..16c5310 100644
--- a/python-nbformat.changes
+++ b/python-nbformat.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sun Jul  9 12:09:42 UTC 2023 - Ben Greiner <code@bnavigator.de>
+
+- Like many other packages, jsonschema 4.18 breaks nbformat.
+  * Pin to jsonschema < 4.18
+
 -------------------------------------------------------------------
 Sun Jun 11 20:10:03 UTC 2023 - Ben Greiner <code@bnavigator.de>
 
diff --git a/python-nbformat.spec b/python-nbformat.spec
index 4175ada..e96d9a6 100644
--- a/python-nbformat.spec
+++ b/python-nbformat.spec
@@ -33,9 +33,9 @@ BuildRequires:  fdupes
 BuildRequires:  nodejs
 BuildRequires:  python-rpm-macros >= 20210929
 Requires:       python-fastjsonschema
-Requires:       python-jsonschema > 2.6
 Requires:       python-jupyter_core
 Requires:       python-traitlets >= 5.1
+Requires:       (python-jsonschema > 2.6 with python-jsonschema < 4.18)
 Provides:       python-jupyter_nbformat = %{version}-%{release}
 Obsoletes:      python-jupyter_nbformat < %{version}
 BuildArch:      noarch
@@ -48,7 +48,7 @@ Requires(postun):update-alternatives
 %endif
 # SECTION test requirements
 BuildRequires:  %{python_module fastjsonschema}
-BuildRequires:  %{python_module jsonschema > 2.6}
+BuildRequires:  %{python_module jsonschema > 2.6 with %python-jsonschema < 4.18}
 BuildRequires:  %{python_module jupyter_core}
 BuildRequires:  %{python_module pep440}
 BuildRequires:  %{python_module pytest}