diff --git a/graph/test/csharp/README.md b/graph/test/csharp/README.md
index 530ecc599..562471426 100644
--- a/graph/test/csharp/README.md
+++ b/graph/test/csharp/README.md
@@ -306,7 +306,7 @@ dotnet build -c Release graph/test/csharp/ground-truth/AxiomCsOracle
 dotnet build -c Release graph/test/csharp/runtime-oracle/AxiomCsInstrument
 ```
 
-`node` must be 18 or newer, and the SAME version across a baseline and a fix run: a
+`node` must be 22.5 or newer (what the repository itself requires), and the SAME version across a baseline and a fix run: a
 number measured on one version and compared against another is not a measurement.
 Every script exits 77 when a tool it needs is missing, so a machine without the
 toolchain skips rather than reporting a false failure.
diff --git a/package.json b/package.json
index 426f256c3..2a28f9fe1 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "schema-doc": "tsx graph/bundle/cli.ts --print-schema > graph/bundle/SCHEMA.md"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=22.5.0"
   },
   "devDependencies": {
     "@types/node": "^20.10.0",
diff --git a/parser/package.json b/parser/package.json
index d928c6d15..a8ac8e3b9 100644
--- a/parser/package.json
+++ b/parser/package.json
@@ -13,7 +13,7 @@
     "test": "vitest"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=22.5.0"
   },
   "dependencies": {
     "entities": "6.0.1",