diff --git a/pyproject.toml b/pyproject.toml
index f94ab0e..365ff43 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
     "Topic :: Text Processing :: Markup :: XML",
 ]
 dependencies = [
-    "lxml>=4.9,<6",
+    "lxml>=4.9,<7",
 ]
 
 [project.optional-dependencies]