diff --git a/package.json b/package.json
index eab57b6..5bba8f2 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "homepage": "https://github.com/drivetech/cellocator-parser#readme",
   "dependencies": {
     "convert-base": "^0.1.0",
-    "date-fns": "^1.28.2",
+    "date-fns": "^4.0.0",
     "pad": "^2.0.0"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 7d89fdf..2322c7a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -318,9 +318,10 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-date-fns@^1.28.2:
-  version "1.28.5"
-  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.28.5.tgz#257cfc45d322df45ef5658665967ee841cd73faf"
+date-fns@^4.0.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-4.1.0.tgz#64b3d83fff5aa80438f5b1a633c2e83b8a1c2d14"
+  integrity sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg==
 
 debug@3.1.0:
   version "3.1.0"