diff --git a/package.json b/package.json
index c5f2094..9057405 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "npm-run-all": "4.1.5",
     "pathpida": "0.18.1",
     "postcss": "8.4.14",
-    "postcss-custom-properties": "12.1.7",
+    "postcss-custom-properties": "12.1.11",
     "postcss-nested": "5.0.6",
     "prettier": "2.6.2",
     "typescript": "4.7.3"
diff --git a/yarn.lock b/yarn.lock
index 4bf3ffe..9c16aab 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -335,15 +335,9 @@ ansi-escapes@^4.3.0:
   resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-4.3.2.tgz#6b2291d1db7d98b6521d5f1efa42d0f3a9feb65e"
   integrity sha512-gKXj5ALrKWQLsYG9jlTRmR/xKluxHV+Z9QEwNIgCfM1/uwPMCuzVVnh5mwTd+OuBZcwSIMbqssNWRm1lE51QaQ==
   dependencies:
-<<<<<<< HEAD
-    type-fest "^0.11.0"
-
-ansi-regex@^5.0.0, ansi-regex@^5.0.1:
-=======
     type-fest "^0.21.3"
 
 ansi-regex@^5.0.1:
->>>>>>> 33771d5 (Headコンポーネント実装)
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.1.tgz#082cb2c89c9fe8659a311a53bd6a4dc5301db304"
   integrity sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==
@@ -2203,10 +2197,10 @@ pify@^3.0.0:
   resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
   integrity sha512-C3FsVNH1udSEX48gGX1xfvwTWfsYWj5U+8/uK15BGzIGrKoUpghX8hWZwa/OFnakBiiVNmBvemTJR5mcy7iPcg==
 
-postcss-custom-properties@12.1.7:
-  version "12.1.7"
-  resolved "https://registry.yarnpkg.com/postcss-custom-properties/-/postcss-custom-properties-12.1.7.tgz#ca470fd4bbac5a87fd868636dafc084bc2a78b41"
-  integrity sha512-N/hYP5gSoFhaqxi2DPCmvto/ZcRDVjE3T1LiAMzc/bg53hvhcHOLpXOHb526LzBBp5ZlAUhkuot/bfpmpgStJg==
+postcss-custom-properties@12.1.11:
+  version "12.1.11"
+  resolved "https://registry.yarnpkg.com/postcss-custom-properties/-/postcss-custom-properties-12.1.11.tgz#d14bb9b3989ac4d40aaa0e110b43be67ac7845cf"
+  integrity sha512-0IDJYhgU8xDv1KY6+VgUwuQkVtmYzRwu+dMjnmdMafXYv86SWqfxkc7qdDvWS38vsjaEtv8e0vGOUQrAiMBLpQ==
   dependencies:
     postcss-value-parser "^4.2.0"