diff --git a/cli/helpers.js b/cli/helpers.js
index 5cc65d4..a0f8a91 100644
--- a/cli/helpers.js
+++ b/cli/helpers.js
@@ -355,7 +355,7 @@ function recursivelyApplyCallbackToHtmlFiles(callback, path, outputDirectory, ro
     }
 
     // apply the callback if it's an HTML file
-    if (fullPath.endsWith(".html")) {
+    if (fullPath.endsWith(".html") || fullPath.endsWith(".htm")) {
         callback(fullPath, fullRootDirectory);
     }
     // else just copy the file as is
diff --git a/package.json b/package.json
index f435fe4..e7fd16c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "staticrypt",
-    "version": "3.5.2",
+    "version": "3.5.3",
     "description": "Password protect a static HTML file without a backend - StatiCrypt uses AES-256 wiht WebCrypto to encrypt your input with your long password and put it in a HTML file with a password prompt that can decrypted in-browser (client side).",
     "main": "index.js",
     "files": [