diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c3139b0..5c58685 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
       with:
         node-version: 14
     - run: npm install
-    - run: npm install typescript@4.0.2
+    - run: npm install typescript@4.5.0
     - run: npm run tsc
 
   ts-current:
diff --git a/package.json b/package.json
index b76545e..21022ad 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   },
   "homepage": "https://github.com/timocov/dts-bundle-generator",
   "dependencies": {
-    "typescript": ">=4.0.2",
+    "typescript": ">=4.5.0",
     "yargs": "^17.6.0"
   },
   "devDependencies": {
diff --git a/src/helpers/typescript.ts b/src/helpers/typescript.ts
index fa82697..f42cca1 100644
--- a/src/helpers/typescript.ts
+++ b/src/helpers/typescript.ts
@@ -278,24 +278,13 @@ function getExportsForName(
 
 export type ModifiersMap = Record<ts.ModifierSyntaxKind, boolean>;
 
-const modifiersPriority: Record<ts.ModifierSyntaxKind, number> = {
+const modifiersPriority: Partial<Record<ts.ModifierSyntaxKind, number>> = {
 	[ts.SyntaxKind.ExportKeyword]: 4,
 	[ts.SyntaxKind.DefaultKeyword]: 3,
 	[ts.SyntaxKind.DeclareKeyword]: 2,
 
 	[ts.SyntaxKind.AsyncKeyword]: 1,
 	[ts.SyntaxKind.ConstKeyword]: 1,
-
-	// we don't care about these modifiers as they are used in classes only and cannot be at the root level
-	[ts.SyntaxKind.AbstractKeyword]: 0,
-	[ts.SyntaxKind.ReadonlyKeyword]: 0,
-	[ts.SyntaxKind.StaticKeyword]: 0,
-	[ts.SyntaxKind.InKeyword]: 0,
-	[ts.SyntaxKind.OutKeyword]: 0,
-	[ts.SyntaxKind.OverrideKeyword]: 0,
-	[ts.SyntaxKind.PrivateKeyword]: 0,
-	[ts.SyntaxKind.ProtectedKeyword]: 0,
-	[ts.SyntaxKind.PublicKeyword]: 0,
 };
 
 export function modifiersToMap(modifiers: (readonly ts.Modifier[]) | undefined | null): ModifiersMap {