diff --git a/.github/workflows/on_pr.yml b/.github/workflows/on_pr.yml
index 268e800..1b4e2cc 100644
--- a/.github/workflows/on_pr.yml
+++ b/.github/workflows/on_pr.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v7
         with:
-          node-version: 24
+          node-version: 26
           cache: yarn
       - run: yarn install --frozen-lockfile
       - run: yarn run build
diff --git a/.github/workflows/on_push.yml b/.github/workflows/on_push.yml
index 9a2cb7e..d8a5dcf 100644
--- a/.github/workflows/on_push.yml
+++ b/.github/workflows/on_push.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v7
         with:
-          node-version: 24
+          node-version: 26
           cache: yarn
       - name: Install dependencies
         run: yarn install --frozen-lockfile
diff --git a/package.json b/package.json
index 4a88899..f039783 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "@changesets/cli": "^3.0.0",
     "@sourceacademy/conductor": "^0.8.0",
     "@sourceacademy/plugin-directory": "source-academy/plugin-directory#main",
-    "@types/node": "^25.9.1",
+    "@types/node": "^26.0.0",
     "@vitest/coverage-istanbul": "^5.0.0",
     "commander": "^15.0.0",
     "eslint": "^10.0.3",
diff --git a/yarn.lock b/yarn.lock
index d4c189a..89a3d7c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2749,12 +2749,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node@npm:^25.9.1":
-  version: 25.9.9
-  resolution: "@types/node@npm:25.9.9"
+"@types/node@npm:^26.0.0":
+  version: 26.6.6
+  resolution: "@types/node@npm:26.6.6"
   dependencies:
-    undici-types: "npm:>=7.24.0 <7.24.7"
-  checksum: 10c0/2ba08caa7118af2f2761f2f5db9b6304faf5bd027a2dcb72bf6fcae3dd9e470d17045fec27f89023c02e7d4e0661c6e5877174bd39794bef080db8b35ad4a1ea
+    undici-types: "npm:~8.9.0"
+  checksum: 10c0/5cb63f644f6e85a257a9cd2403cbcbe196760e2a35fd3ec9fb8b5cff663e14cc832b198cc17b53f870a2e30900ed45a1fb3f53e6589aba26b8e8c484aa672053
   languageName: node
   linkType: hard
 
@@ -6207,7 +6207,7 @@ __metadata:
     "@changesets/cli": "npm:^3.0.0"
     "@sourceacademy/conductor": "npm:^0.8.0"
     "@sourceacademy/plugin-directory": "source-academy/plugin-directory#main"
-    "@types/node": "npm:^25.9.1"
+    "@types/node": "npm:^26.0.0"
     "@vitest/coverage-istanbul": "npm:^5.0.0"
     commander: "npm:^15.0.0"
     eslint: "npm:^10.0.3"
@@ -7231,13 +7231,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"undici-types@npm:>=7.24.0 <7.24.7":
-  version: 7.24.6
-  resolution: "undici-types@npm:7.24.6"
-  checksum: 10c0/d9cd8befb643ac904615c280a095ba4240531f6bb4a5e75a22a7483630ca8d3f1016d2ab6ace6ceda1f63b3a2db2fe037fafe121d6917a0187573aa548ff78ca
-  languageName: node
-  linkType: hard
-
 "undici-types@npm:~8.9.0":
   version: 8.9.0
   resolution: "undici-types@npm:8.9.0"