diff --git a/requirements.txt b/requirements.txt
index ac809a182..d7aa5e426 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ docutils==0.16            # via codechat, sphinx
 idna==2.9                 # via requests
 imagesize==1.2.0          # via sphinx
 jinja2==2.11.2            # via sphinx
-lxml==4.5.1               # via codechat
+lxml==4.6.5               # via codechat
 markupsafe==1.1.1         # via jinja2
 packaging==20.4           # via sphinx
 paver==1.3.4              # via -r requirements.in, sphinxcontrib-paverutils