diff --git a/src/utilities/readDirectory.js b/src/utilities/readDirectory.js
index 4d020ab..15df7ad 100644
--- a/src/utilities/readDirectory.js
+++ b/src/utilities/readDirectory.js
@@ -40,7 +40,7 @@ hasMultipleExtensions = (fileName) => {
 };
 
 isSafeName = (fileName) => {
-    return /^[a-z][a-z0-9\.]+$/i.test(fileName);
+    return /^[a-z][a-z0-9\._]+$/i.test(fileName);
 };
 
 removeDuplicates = (files) => {