diff --git a/package-lock.json b/package-lock.json
index e6a852eb..884475ae 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@leichtgewicht/dns-packet": "^6.0.3",
         "@peculiar/asn1-schema": "^2.3.8",
         "bigint-buffer": "^1.1.5",
-        "date-fns": "^2.30.0"
+        "date-fns": "^4.1.0"
       },
       "devDependencies": {
         "@jest/globals": "^29.7.0",
@@ -837,6 +837,7 @@
       "version": "7.21.5",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.21.5.tgz",
       "integrity": "sha512-8jI69toZqqcsnqGGqwGS4Qb1VwLOEp4hz+CXPywcvjs60u3B4Pom/U/7rm4W8tMOYEB+E9wgD0mW1l3r8qlI9Q==",
+      "dev": true,
       "dependencies": {
         "regenerator-runtime": "^0.13.11"
       },
@@ -5932,18 +5933,12 @@
       "dev": true
     },
     "node_modules/date-fns": {
-      "version": "2.30.0",
-      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.30.0.tgz",
-      "integrity": "sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==",
-      "dependencies": {
-        "@babel/runtime": "^7.21.0"
-      },
-      "engines": {
-        "node": ">=0.11"
-      },
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.1.0.tgz",
+      "integrity": "sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg==",
       "funding": {
-        "type": "opencollective",
-        "url": "https://opencollective.com/date-fns"
+        "type": "github",
+        "url": "https://github.com/sponsors/kossnocorp"
       }
     },
     "node_modules/debug": {
@@ -12971,7 +12966,8 @@
     "node_modules/regenerator-runtime": {
       "version": "0.13.11",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.11.tgz",
-      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg=="
+      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==",
+      "dev": true
     },
     "node_modules/regexp-ast-analysis": {
       "version": "0.5.1",
@@ -16091,6 +16087,7 @@
       "version": "7.21.5",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.21.5.tgz",
       "integrity": "sha512-8jI69toZqqcsnqGGqwGS4Qb1VwLOEp4hz+CXPywcvjs60u3B4Pom/U/7rm4W8tMOYEB+E9wgD0mW1l3r8qlI9Q==",
+      "dev": true,
       "requires": {
         "regenerator-runtime": "^0.13.11"
       }
@@ -19656,12 +19653,9 @@
       "dev": true
     },
     "date-fns": {
-      "version": "2.30.0",
-      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-2.30.0.tgz",
-      "integrity": "sha512-fnULvOpxnC5/Vg3NCiWelDsLiUc9bRwAPs/+LfTLNvetFCtCTN+yQz15C/fs4AwX1R9K5GLtLfn8QW+dWisaAw==",
-      "requires": {
-        "@babel/runtime": "^7.21.0"
-      }
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.1.0.tgz",
+      "integrity": "sha512-Ukq0owbQXxa/U3EGtsdVBkR1w7KOQ5gIBqdH2hkvknzZPYvBxb/aa6E8L7tmjFtkwZBu3UXBbjIgPo/Ez4xaNg=="
     },
     "debug": {
       "version": "4.3.4",
@@ -24751,7 +24745,8 @@
     "regenerator-runtime": {
       "version": "0.13.11",
       "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.11.tgz",
-      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg=="
+      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==",
+      "dev": true
     },
     "regexp-ast-analysis": {
       "version": "0.5.1",
diff --git a/package.json b/package.json
index 557344e4..819fd358 100644
--- a/package.json
+++ b/package.json
@@ -60,7 +60,7 @@
     "@leichtgewicht/dns-packet": "^6.0.3",
     "@peculiar/asn1-schema": "^2.3.8",
     "bigint-buffer": "^1.1.5",
-    "date-fns": "^2.30.0"
+    "date-fns": "^4.1.0"
   },
   "prettier": "@relaycorp/shared-config/.prettierrc.json",
   "publishConfig": {