diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index e6f993c77..900af94bb 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -13,7 +13,7 @@
         "axios": "^1.13.5",
         "clipboard": "^2.0.4",
         "css-vars-ponyfill": "^2.4.3",
-        "dompurify": "^3.2.4",
+        "dompurify": "^3.4.0",
         "epubjs": "^0.3.93",
         "file-loader": "^6.2.0",
         "glob": "^9.3.5",
@@ -3149,9 +3149,9 @@
       }
     },
     "node_modules/dompurify": {
-      "version": "3.3.1",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.1.tgz",
-      "integrity": "sha512-qkdCKzLNtrgPFP1Vo+98FRzJnBRGe4ffyCea9IwHB1fyxPOeNTHpLKYGd4Uk9xvNoH0ZoOjwZxNptyMwqrId1Q==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.4.0.tgz",
+      "integrity": "sha512-nolgK9JcaUXMSmW+j1yaSvaEaoXYHwWyGJlkoCTghc97KgGDDSnpoU/PlEnw63Ah+TGKFOyY+X5LnxaWbCSfXg==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"
diff --git a/frontend/package.json b/frontend/package.json
index 25bcdecbb..90e73b8f6 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -25,7 +25,7 @@
     "axios": "^1.13.5",
     "clipboard": "^2.0.4",
     "css-vars-ponyfill": "^2.4.3",
-    "dompurify": "^3.2.4",
+    "dompurify": "^3.4.0",
     "epubjs": "^0.3.93",
     "file-loader": "^6.2.0",
     "glob": "^9.3.5",