diff --git a/lib/main.js b/lib/main.js
index 1e10fdf..3a28fca 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -65,7 +65,7 @@ function run() {
                 }
             };
             options.cwd = '/github/home/rpmbuild/SRPMS/';
-            yield exec.exec('ls', options);
+            yield exec.exec('ls', ['-C'], options);
             core.setOutput("source_rpm_path", `/github/home/rpmbuild/SRPMS/${myOutput}`); // make option to upload source rpm
         }
         catch (error) {
diff --git a/src/main.ts b/src/main.ts
index 8bc1c1c..55f8fbc 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -74,7 +74,7 @@ async function run() {
     };
     options.cwd = '/github/home/rpmbuild/SRPMS/';
 
-    await exec.exec('ls', options);
+    await exec.exec('ls', [ '-C' ], options);
 
     core.setOutput("source_rpm_path", `/github/home/rpmbuild/SRPMS/${myOutput}`); // make option to upload source rpm