diff --git a/package-lock.json b/package-lock.json
index be0b882..11c30a9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@kubosho/configs": "^4.0.8",
         "@vivliostyle/cli": "^8.19.0",
         "npm-run-all": "^4.1.5",
-        "sass": "^1.85.1",
+        "sass": "^1.93.3",
         "vivliostyle-theme-scripts": "^0.3.1"
       }
     },
@@ -18538,9 +18538,9 @@
       "license": "MIT"
     },
     "node_modules/sass": {
-      "version": "1.85.1",
-      "resolved": "https://registry.npmjs.org/sass/-/sass-1.85.1.tgz",
-      "integrity": "sha512-Uk8WpxM5v+0cMR0XjX9KfRIacmSG86RH4DCCZjLU2rFh5tyutt9siAXJ7G+YfxQ99Q6wrRMbMlVl6KqUms71ag==",
+      "version": "1.93.3",
+      "resolved": "https://registry.npmjs.org/sass/-/sass-1.93.3.tgz",
+      "integrity": "sha512-elOcIZRTM76dvxNAjqYrucTSI0teAF/L2Lv0s6f6b7FOwcwIuA357bIE871580AjHJuSvLIRUosgV+lIWx6Rgg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 1083671..41dd74d 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "@kubosho/configs": "^4.0.8",
     "@vivliostyle/cli": "^8.19.0",
     "npm-run-all": "^4.1.5",
-    "sass": "^1.85.1",
+    "sass": "^1.93.3",
     "vivliostyle-theme-scripts": "^0.3.1"
   },
   "files": [