diff --git a/requirements.txt b/requirements.txt
index 5bbb4818b..06519de58 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,8 @@
 # Requirements for building PEPs with Sphinx
 Pygments >= 2.9.0
-Sphinx >= 5.1.1,<=6.0.0
+# Sphinx 6.1.0 broke copying images in parallel builds; fixed in 6.1.2
+# See https://github.com/sphinx-doc/sphinx/pull/11100
+Sphinx >= 5.1.1, != 6.1.0, != 6.1.1
 docutils >= 0.19.0
 
 # For RSS