diff --git a/bench/real-world.ts b/bench/real-world.ts
index 098a5c6..0e57ac4 100644
--- a/bench/real-world.ts
+++ b/bench/real-world.ts
@@ -90,7 +90,7 @@ function collectSourceFiles(root: string, cap: number): string[] {
     if (out.length >= cap) return;
     let entries: ReturnType<typeof readdirSync>;
     try {
-      entries = readdirSync(dir, { withFileTypes: true });
+      entries = readdirSync(dir, { withFileTypes: true, encoding: "utf-8" });
     } catch {
       return;
     }
diff --git a/src/miners/ast-miner.ts b/src/miners/ast-miner.ts
index 1857723..30b577b 100644
--- a/src/miners/ast-miner.ts
+++ b/src/miners/ast-miner.ts
@@ -612,7 +612,7 @@ export function extractDirectory(
 
     let entries: Dirent[];
     try {
-      entries = readdirSync(dir, { withFileTypes: true });
+      entries = readdirSync(dir, { withFileTypes: true, encoding: "utf-8" });
     } catch {
       return;
     }