diff --git a/package-lock.json b/package-lock.json
index ef804c9..2e8e064 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -846,9 +846,9 @@
       "optional": true
     },
     "dayjs": {
-      "version": "1.8.17",
-      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.8.17.tgz",
-      "integrity": "sha512-47VY/htqYqr9GHd7HW/h56PpQzRBSJcxIQFwqL3P20bMF/3az5c3PWdVY3LmPXFl6cQCYHL7c79b9ov+2bOBbw=="
+      "version": "1.8.28",
+      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.8.28.tgz",
+      "integrity": "sha512-ccnYgKC0/hPSGXxj7Ju6AV/BP4HUkXC2u15mikXT5mX9YorEaoi1bEKOmAqdkJHN4EEkmAf97SpH66Try5Mbeg=="
     },
     "debug": {
       "version": "2.6.9",
diff --git a/package.json b/package.json
index 098a81c..a6b3ca1 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "dependencies": {
-    "dayjs": "^1.8.17",
+    "dayjs": "^1.8.28",
     "express": "^4.17.1",
     "firebase-admin": "^8.8.0",
     "morgan": "^1.9.1",