diff --git a/lib/main.js b/lib/main.js
index d359b95..b022235 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -60,7 +60,7 @@ function run() {
             }
             let body;
             if (path) {
-                body = fs_1.readFileSync(path);
+                body = fs_1.readFileSync(path, 'utf-8');
             }
             else {
                 body = message;
diff --git a/src/main.ts b/src/main.ts
index d254c3f..7915d69 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -35,7 +35,7 @@ async function run() {
     let body;
 
     if (path) {
-      body = readFileSync(path);
+      body = readFileSync(path, 'utf-8');
     } else {
       body = message;
     }