diff --git a/pyproject.toml b/pyproject.toml
index de2ab7f6..e2f652c6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ dependencies = [
   "cryptography>=43.0.0",
   "defusedxml>=0.6.0,<1",
   "jsonschema>=3.1.1",
-  "lxml>=5.2.1,<6",
+  "lxml>=5.2.1,<7",
   "marshmallow>=3,<4",
   "pydantic>=2.10.0,!=1.7.*,!=1.8.*,!=1.9.*",
   "pyOpenSSL>=24.0.0",
diff --git a/requirements.in b/requirements.in
index a3d753e4..d7c28fa6 100644
--- a/requirements.in
+++ b/requirements.in
@@ -13,7 +13,7 @@ Django>=4.2
 djangorestframework>=3.10.3,<3.17
 importlib-metadata==8.7.0
 jsonschema==4.24.0
-lxml==5.4.0
+lxml==6.0.0
 marshmallow==3.26.1
 pydantic==2.11.7
 pyOpenSSL==25.1.0