diff --git a/package.json b/package.json
index c5f2094..e618dc6 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     ]
   },
   "dependencies": {
-    "dayjs": "1.11.2",
+    "dayjs": "1.11.19",
     "highlight.js": "11.5.1",
     "lazysizes": "^5.3.2",
     "microcms-js-sdk": "2.0.0",
diff --git a/yarn.lock b/yarn.lock
index 4bf3ffe..0ee3912 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==
@@ -680,10 +674,10 @@ damerau-levenshtein@^1.0.7:
   resolved "https://registry.yarnpkg.com/damerau-levenshtein/-/damerau-levenshtein-1.0.8.tgz#b43d286ccbd36bc5b2f7ed41caf2d0aba1f8a6e7"
   integrity sha512-sdQSFB7+llfUcQHUQO3+B8ERRj0Oa4w9POWMI/puGtuf7gFywGmkaLCElnudfTiKZV+NvHqL0ifzdrI8Ro7ESA==
 
-dayjs@1.11.2:
-  version "1.11.2"
-  resolved "https://registry.yarnpkg.com/dayjs/-/dayjs-1.11.2.tgz#fa0f5223ef0d6724b3d8327134890cfe3d72fbe5"
-  integrity sha512-F4LXf1OeU9hrSYRPTTj/6FbO4HTjPKXvEIC1P2kcnFurViINCVk3ZV0xAS3XVx9MkMsXbbqlK6hjseaYbgKEHw==
+dayjs@1.11.19:
+  version "1.11.19"
+  resolved "https://registry.yarnpkg.com/dayjs/-/dayjs-1.11.19.tgz#15dc98e854bb43917f12021806af897c58ae2938"
+  integrity sha512-t5EcLVS6QPBNqM2z8fakk/NKel+Xzshgt8FFKAn+qwlD1pzZWxh0nVCrvFK7ZDb6XucZeF9z8C7CBWTRIVApAw==
 
 debug@^2.6.9:
   version "2.6.9"