diff --git a/src/components/Content/Sidenote/Container/index.tsx b/src/components/Content/Sidenote/Container/index.tsx
index c4c38ea..c2a451e 100644
--- a/src/components/Content/Sidenote/Container/index.tsx
+++ b/src/components/Content/Sidenote/Container/index.tsx
@@ -13,7 +13,9 @@ export default function Container({ items }: ContainerProps) {
           key={sidenote.id}
           id={sidenote.id}
           className={styles.wrapper}
-          style={{ positionAnchor: `--note-${sidenote.id}` }}
+          style={
+            { positionAnchor: `--note-${sidenote.id}` } as React.CSSProperties
+          }
         >
           <div className={`${styles.note} ${styles[sidenote.type]}`}>
             <span className={styles.marker}>
diff --git a/src/components/Content/Sidenote/Item/index.tsx b/src/components/Content/Sidenote/Item/index.tsx
index e6bb94b..32f9421 100644
--- a/src/components/Content/Sidenote/Item/index.tsx
+++ b/src/components/Content/Sidenote/Item/index.tsx
@@ -8,7 +8,7 @@ export default function SidenoteItem({ id, marker, content, type }: Sidenote) {
         href={`#${id}`}
         className={styles.ref}
         id={`#ref-${id}`}
-        style={{ anchorName: `--note-${id}` }}
+        style={{ anchorName: `--note-${id}` } as React.CSSProperties}
       >
         [{marker}]
       </a>
diff --git a/stylelint.config.mjs b/stylelint.config.mjs
index 661c463..a1ba389 100644
--- a/stylelint.config.mjs
+++ b/stylelint.config.mjs
@@ -6,6 +6,18 @@ const stylelintConfig = {
   ],
   rules: {
     'declaration-block-no-redundant-longhand-properties': null,
+    'declaration-property-value-no-unknown': [
+      true,
+      {
+        ignoreProperties: {
+          top: [/^anchor\(/],
+          left: [/^anchor\(/],
+          right: [/^anchor\(/],
+          bottom: [/^anchor\(/],
+          inset: [/^anchor\(/],
+        },
+      },
+    ],
     'no-descending-specificity': null,
     'selector-class-pattern': null,
     'custom-property-pattern': null,