diff --git a/requirements/main.txt b/requirements/main.txt
index 64ec7df99c12..40f774b991d0 100644
--- a/requirements/main.txt
+++ b/requirements/main.txt
@@ -292,9 +292,9 @@ cssselect==1.1.0 \
     --hash=sha256:f612ee47b749c877ebae5bb77035d8f4202c6ad0f0fc1271b3c18ad6c4468ecf \
     --hash=sha256:f95f8dedd925fd8f54edb3d2dfb44c190d9d18512377d3c1e2388d16126879bc
     # via premailer
-cssutils==2.3.0 \
-    --hash=sha256:0cf1f6086b020dee18048ff3999339499f725934017ef9ae2cd5bb77f9ab5f46 \
-    --hash=sha256:b2d3b16047caae82e5c590036935bafa1b621cf45c2f38885af4be4838f0fd00
+cssutils==2.4.0 \
+    --hash=sha256:2d97210a83b0a3fe1e4469f5ff9a6420b078572035188b1bab7103c3a36dc89b \
+    --hash=sha256:6c7ab239b432c157cd55303993935b92be07272e694d66c75b95eb56928936f6
     # via premailer
 datadog==0.43.0 \
     --hash=sha256:1f2123083d9e1add6f238c62714b76ac2fc134d7d1c435cd82b976487b191b96 \