diff --git a/package-lock.json b/package-lock.json
index 22b98dd..c0a08eb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@eslint/js": "^10.0.1",
         "@gnolith/diamond": "file:../diamond/gnolith-diamond-0.5.0.tgz",
         "@gnolith/taproot": "file:../taproot-artifacts/gnolith-taproot-0.5.0.tgz",
-        "@types/node": "^24.0.0",
+        "@types/node": "^26.1.2",
         "@vitest/coverage-v8": "^4.1.10",
         "ajv-formats": "^3.0.1",
         "eslint": "^10.7.0",
@@ -7123,13 +7123,13 @@
       }
     },
     "node_modules/@types/node": {
-      "version": "24.13.3",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-24.13.3.tgz",
-      "integrity": "sha512-Dh8vAsV36ig5wa9OX4pXvMc9D3Veibfw2wix0CUwYODLD8nkj9UsLjASr49nPg+2eKzxhBV+v7L8pXvT4e639Q==",
+      "version": "26.1.2",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.1.2.tgz",
+      "integrity": "sha512-Vu4a5UFA9rIIFJ7rB/Vaafh9lrCQszopTCx6KjFboXTGQbPNasehVR5TEiithSDGyd1DEiUByggTZsg8jukeIg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~7.18.0"
+        "undici-types": "~8.3.0"
       }
     },
     "node_modules/@types/readable-stream": {
@@ -11666,9 +11666,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "7.18.2",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.18.2.tgz",
-      "integrity": "sha512-AsuCzffGHJybSaRrmr5eHr81mwJU3kjw6M+uprWvCXiNeN9SOGwQ3Jn8jb8m3Z6izVgknn1R0FTCEAP2QrLY/w==",
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
+      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index 23d2a06..f7a0181 100644
--- a/package.json
+++ b/package.json
@@ -132,7 +132,7 @@
     "@eslint/js": "^10.0.1",
     "@gnolith/diamond": "file:../diamond/gnolith-diamond-0.5.0.tgz",
     "@gnolith/taproot": "file:../taproot-artifacts/gnolith-taproot-0.5.0.tgz",
-    "@types/node": "^24.0.0",
+    "@types/node": "^26.1.2",
     "@vitest/coverage-v8": "^4.1.10",
     "ajv-formats": "^3.0.1",
     "eslint": "^10.7.0",