diff --git a/scraper/cache.ts b/scraper/cache.ts
index 3f6c26390..ab4160df0 100644
--- a/scraper/cache.ts
+++ b/scraper/cache.ts
@@ -27,6 +27,6 @@ export class Cache {
     this.debug(`set: key=${key}`);
     const path = this.cachePath(key);
     mkdirSync(path.split("/").slice(0, -1).join("/"), { recursive: true });
-    writeFileSync(path, data);
+    writeFileSync(path, data, "utf-8");
   }
 }
diff --git a/scraper/ics-generator.ts b/scraper/ics-generator.ts
index abd388dd2..c2c051826 100644
--- a/scraper/ics-generator.ts
+++ b/scraper/ics-generator.ts
@@ -119,7 +119,7 @@ export class ICSGenerator {
       if (lines.length <= 10) {
         this.debug("Skipping empty ICS file:", filepath);
       } else {
-        writeFileSync(filepath, lines.join("\n"));
+        writeFileSync(filepath, lines.join("\n"), "utf-8");
       }
     }
   }
diff --git a/scraper/scraper.ts b/scraper/scraper.ts
index 4be81b929..3b727d5ba 100644
--- a/scraper/scraper.ts
+++ b/scraper/scraper.ts
@@ -70,7 +70,7 @@ export class Scraper {
   private saveCalendar(): void {
     this.debug("saveCalendar");
     const calendar = this.getCalendar();
-    writeFileSync("./output/calendar.json", JSON.stringify(calendar, null, 2));
+    writeFileSync("./output/calendar.json", JSON.stringify(calendar, null, 2), "utf-8");
   }
 
   private async scrapeEvents(): Promise<void> {