diff --git a/package.json b/package.json
index e3a97c50..2cd815b8 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "@types/node": "^18.11.0",
     "@types/semver": "^7.3.9",
     "@typescript-eslint/eslint-plugin": "^5.4.0",
-    "@typescript-eslint/parser": "~5.44.0",
+    "@typescript-eslint/parser": "~5.45.0",
     "benchmark": "^2.1.4",
     "chai": "^4.3.4",
     "code-red": "^0.2.3",
diff --git a/src/context/index.ts b/src/context/index.ts
index 5bf7f6bc..5584ccd0 100644
--- a/src/context/index.ts
+++ b/src/context/index.ts
@@ -130,7 +130,7 @@ export class Context {
 
   public readonly letDirCollections = new LetDirectiveCollections();
 
-  private state: { isTypeScript?: boolean } = {};
+  private readonly state: { isTypeScript?: boolean } = {};
 
   private readonly blocks: Block[] = [];