diff --git a/Cargo.toml b/Cargo.toml
index 5b7c1a0d..b4583e08 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,7 +37,7 @@ memchr = "2.4"
 base64 = "0.13"
 rmp-serde = "0.15"
 lifeguard = { version = "^ 0.6.1", optional = true }
-cssparser = { version = "0.28", optional = true }
+cssparser = { version = "0.34", optional = true }
 selectors = { version = "0.23", optional = true }
 serde_json = { version = "1.0", optional = true }
 thiserror = "1.0"