diff --git a/package-lock.json b/package-lock.json
index 45a862c..098ab78 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
         "connect": "^3.7.0",
         "destroy": "^1.0.4",
         "is-url": "^1.2.2",
-        "mime-types": "^2.1.35",
+        "mime-types": "^3.0.2",
         "minimatch": "^6.1.6",
         "morgan": "^1.8.2",
         "on-finished": "^2.2.0",
@@ -32,7 +32,7 @@
         "@types/chai": "^5.2.0",
         "@types/chai-as-promised": "^8.0.2",
         "@types/connect": "^3.4.35",
-        "@types/mime-types": "^2.1.1",
+        "@types/mime-types": "^3.0.1",
         "@types/mocha": "^10.0.0",
         "@types/node": "^26.1.1",
         "@types/sinon": "^22.0.0",
@@ -1121,10 +1121,11 @@
       "dev": true
     },
     "node_modules/@types/mime-types": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/@types/mime-types/-/mime-types-2.1.4.tgz",
-      "integrity": "sha512-lfU4b34HOri+kAY5UheuFMWPDOI+OPceBSHZKp69gEyTL/mmJ4cnU6Y/rlme3UL3GyOn6Y42hyIEw0/q8sWx5w==",
-      "dev": true
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@types/mime-types/-/mime-types-3.0.1.tgz",
+      "integrity": "sha512-xRMsfuQbnRq1Ef+C+RKaENOxXX87Ygl38W1vDfPHRku02TgQr+Qd8iivLtAMcR0KF5/29xlnFihkTlbqFrGOVQ==",
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@types/mocha": {
       "version": "10.0.10",
@@ -2947,6 +2948,19 @@
         "node": ">= 6"
       }
     },
+    "node_modules/form-data/node_modules/mime-types": {
+      "version": "2.1.35",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "mime-db": "1.52.0"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
     "node_modules/formidable": {
       "version": "3.5.4",
       "resolved": "https://registry.npmjs.org/formidable/-/formidable-3.5.4.tgz",
@@ -3887,12 +3901,26 @@
       }
     },
     "node_modules/mime-types": {
-      "version": "2.1.35",
-      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
-      "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-3.0.2.tgz",
+      "integrity": "sha512-Lbgzdk0h4juoQ9fCKXW4by0UJqj+nOOrI9MJ1sSj4nI8aI2eo1qmvQEie4VD1glsS250n15LsWsYtCugiStS5A==",
+      "license": "MIT",
       "dependencies": {
-        "mime-db": "1.52.0"
+        "mime-db": "^1.54.0"
       },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
+    "node_modules/mime-types/node_modules/mime-db": {
+      "version": "1.54.0",
+      "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.54.0.tgz",
+      "integrity": "sha512-aU5EJuIN2WDemCcAp2vFBfp/m4EAhWJnUNSSw0ixs7/kXbd6Pg64EmwJkNdFhB8aWt1sH2CTXrLxo/iAGV3oPQ==",
+      "license": "MIT",
       "engines": {
         "node": ">= 0.6"
       }
diff --git a/package.json b/package.json
index 0777107..a3e8141 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "connect": "^3.7.0",
     "destroy": "^1.0.4",
     "is-url": "^1.2.2",
-    "mime-types": "^2.1.35",
+    "mime-types": "^3.0.2",
     "minimatch": "^6.1.6",
     "morgan": "^1.8.2",
     "on-finished": "^2.2.0",
@@ -76,7 +76,7 @@
     "@types/chai": "^5.2.0",
     "@types/chai-as-promised": "^8.0.2",
     "@types/connect": "^3.4.35",
-    "@types/mime-types": "^2.1.1",
+    "@types/mime-types": "^3.0.1",
     "@types/mocha": "^10.0.0",
     "@types/node": "^26.1.1",
     "@types/sinon": "^22.0.0",
diff --git a/test/integration/serving-files.spec.ts b/test/integration/serving-files.spec.ts
index 9bdcd34..8aa0e5a 100644
--- a/test/integration/serving-files.spec.ts
+++ b/test/integration/serving-files.spec.ts
@@ -102,7 +102,7 @@ describe("serves", () => {
       .get("/app.js")
       .expect(200)
       .expect('console.log("js")')
-      .expect("Content-Type", "application/javascript; charset=utf-8");
+      .expect("Content-Type", "text/javascript; charset=utf-8");
   });
 
   it("from custom current working directory", async () => {
@@ -252,7 +252,7 @@ describe("serves", () => {
       await request(app)
         .get("/__/env.js")
         .expect(200)
-        .expect("Content-Type", "application/javascript; charset=utf-8");
+        .expect("Content-Type", "text/javascript; charset=utf-8");
     });
 
     it("defaults to .env.json", async () => {
diff --git a/test/unit/middleware/env.spec.js b/test/unit/middleware/env.spec.js
index f25f90c..e486412 100644
--- a/test/unit/middleware/env.spec.js
+++ b/test/unit/middleware/env.spec.js
@@ -69,7 +69,7 @@ describe("env", () => {
     void request(app)
       .get("/__/env.js")
       .expect(200)
-      .expect("content-type", "application/javascript; charset=utf-8")
+      .expect("content-type", "text/javascript; charset=utf-8")
       .end(done);
   });
 });