diff --git a/package-lock.json b/package-lock.json
index bff8a11e1..c3fe3f09e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6586,9 +6586,9 @@
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     },
     "node_modules/luxon": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/luxon/-/luxon-2.4.0.tgz",
-      "integrity": "sha512-w+NAwWOUL5hO0SgwOHsMBAmZ15SoknmQXhSO0hIbJCAmPKSsGeK8MlmhYh2w6Iib38IxN2M+/ooXWLbeis7GuA==",
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-2.5.2.tgz",
+      "integrity": "sha512-Yg7/RDp4nedqmLgyH0LwgGRvMEKVzKbUdkBYyCosbHgJ+kaOUx0qzSiSatVc3DFygnirTPYnMM2P5dg2uH1WvA==",
       "dev": true,
       "engines": {
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@@ -10028,7 +10028,7 @@
         "lit-dev-server": "^0.0.0",
         "lit-dev-tools-cjs": "^0.0.0",
         "lit-dev-tools-esm": "^0.0.0",
-        "luxon": "^2.0.2",
+        "luxon": "^2.5.2",
         "markdown-it": "^12.0.4",
         "markdown-it-anchor": "^8.3.0",
         "markdown-it-attrs": "^4.0.0",
@@ -15438,7 +15438,7 @@
         "lit-dev-server": "^0.0.0",
         "lit-dev-tools-cjs": "^0.0.0",
         "lit-dev-tools-esm": "^0.0.0",
-        "luxon": "^2.0.2",
+        "luxon": "^2.5.2",
         "markdown-it": "^12.0.4",
         "markdown-it-anchor": "^8.3.0",
         "markdown-it-attrs": "^4.0.0",
@@ -15728,9 +15728,9 @@
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     },
     "luxon": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/luxon/-/luxon-2.4.0.tgz",
-      "integrity": "sha512-w+NAwWOUL5hO0SgwOHsMBAmZ15SoknmQXhSO0hIbJCAmPKSsGeK8MlmhYh2w6Iib38IxN2M+/ooXWLbeis7GuA==",
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-2.5.2.tgz",
+      "integrity": "sha512-Yg7/RDp4nedqmLgyH0LwgGRvMEKVzKbUdkBYyCosbHgJ+kaOUx0qzSiSatVc3DFygnirTPYnMM2P5dg2uH1WvA==",
       "dev": true
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diff --git a/packages/lit-dev-content/package.json b/packages/lit-dev-content/package.json
index bb760ddf7..9c01deb42 100644
--- a/packages/lit-dev-content/package.json
+++ b/packages/lit-dev-content/package.json
@@ -153,7 +153,7 @@
     "lit-dev-server": "^0.0.0",
     "lit-dev-tools-cjs": "^0.0.0",
     "lit-dev-tools-esm": "^0.0.0",
-    "luxon": "^2.0.2",
+    "luxon": "^2.5.2",
     "markdown-it": "^12.0.4",
     "markdown-it-anchor": "^8.3.0",
     "markdown-it-attrs": "^4.0.0",