diff --git a/package-lock.json b/package-lock.json
index f08e084..611d6be 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "http-server": "^14.1.1",
         "prettier": "3.5.3",
         "sass-embedded": "^1.86.0",
-        "tailwindcss": "^4.0.5",
+        "tailwindcss": "^4.0.15",
         "textlint": "^14.5.0",
         "textlint-filter-rule-comments": "^1.2.2",
         "textlint-rule-apostrophe": "^3.0.0",
@@ -2042,6 +2042,13 @@
         "tailwindcss": "4.0.14"
       }
     },
+    "node_modules/@tailwindcss/node/node_modules/tailwindcss": {
+      "version": "4.0.14",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.0.14.tgz",
+      "integrity": "sha512-92YT2dpt671tFiHH/e1ok9D987N9fHD5VWoly1CdPD/Cd1HMglvZwP3nx2yTj2lbXDAHt8QssZkxTLCCTNL+xw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@tailwindcss/oxide": {
       "version": "4.0.14",
       "resolved": "https://registry.npmjs.org/@tailwindcss/oxide/-/oxide-4.0.14.tgz",
@@ -2268,6 +2275,13 @@
         "vite": "^5.2.0 || ^6"
       }
     },
+    "node_modules/@tailwindcss/vite/node_modules/tailwindcss": {
+      "version": "4.0.14",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.0.14.tgz",
+      "integrity": "sha512-92YT2dpt671tFiHH/e1ok9D987N9fHD5VWoly1CdPD/Cd1HMglvZwP3nx2yTj2lbXDAHt8QssZkxTLCCTNL+xw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@textlint-rule/textlint-rule-no-unmatched-pair": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/@textlint-rule/textlint-rule-no-unmatched-pair/-/textlint-rule-no-unmatched-pair-2.0.4.tgz",
@@ -15397,9 +15411,9 @@
       }
     },
     "node_modules/tailwindcss": {
-      "version": "4.0.14",
-      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.0.14.tgz",
-      "integrity": "sha512-92YT2dpt671tFiHH/e1ok9D987N9fHD5VWoly1CdPD/Cd1HMglvZwP3nx2yTj2lbXDAHt8QssZkxTLCCTNL+xw==",
+      "version": "4.0.15",
+      "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.0.15.tgz",
+      "integrity": "sha512-6ZMg+hHdMJpjpeCCFasX7K+U615U9D+7k5/cDK/iRwl6GptF24+I/AbKgOnXhVKePzrEyIXutLv36n4cRsq3Sg==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index d49d925..1bd9f79 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "http-server": "^14.1.1",
     "prettier": "3.5.3",
     "sass-embedded": "^1.86.0",
-    "tailwindcss": "^4.0.5",
+    "tailwindcss": "^4.0.15",
     "textlint": "^14.5.0",
     "textlint-filter-rule-comments": "^1.2.2",
     "textlint-rule-apostrophe": "^3.0.0",