make it build

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py

index 0a6043ae8d..d12ef15043 100644
--- a/synapse/python_dependencies.py
+++ b/synapse/python_dependencies.py
@@ -36,6 +36,7 @@ REQUIREMENTS = {
     "blist": ["blist"],
     "pysaml2>=3.0.0,<4.0.0": ["saml2>=3.0.0,<4.0.0"],
     "pymacaroons-pynacl": ["pymacaroons"],
+    "lxml>=3.6.0": ["lxml"],
 }
 CONDITIONAL_REQUIREMENTS = {
     "web_client": {