diff --git a/src/atrule.rs b/src/atrule.rs
index 4219991..a0703a2 100644
--- a/src/atrule.rs
+++ b/src/atrule.rs
@@ -170,7 +170,7 @@ impl TryFrom<&str> for AtRuleKind {
             "function" => Ok(Self::Function),
             "return" => Ok(Self::Return),
             "extend" => Ok(Self::Extend),
-            "atroot" => Ok(Self::AtRoot),
+            "at-root" => Ok(Self::AtRoot),
             "error" => Ok(Self::Error),
             "warn" => Ok(Self::Warn),
             "debug" => Ok(Self::Debug),
@@ -212,7 +212,7 @@ impl Display for AtRuleKind {
             Self::Function => write!(f, "@function"),
             Self::Return => write!(f, "@return"),
             Self::Extend => write!(f, "@extend"),
-            Self::AtRoot => write!(f, "@atroot"),
+            Self::AtRoot => write!(f, "@at-root"),
             Self::Error => write!(f, "@error"),
             Self::Warn => write!(f, "@warn"),
             Self::Debug => write!(f, "@debug"),