diff --git a/.gitignore b/.gitignore
index 5ceda4d..df86c2b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,4 +36,7 @@ jspm_packages
 # Optional REPL history
 .node_repl_history
 
-build
\ No newline at end of file
+build
+
+# IDE
+.idea/
diff --git a/es5/index.js b/es5/index.js
index 682de02..d4b5f3a 100644
--- a/es5/index.js
+++ b/es5/index.js
@@ -136,7 +136,7 @@ function depascalize$1(str, separator) {
 }
 
 function shouldProcessValue(value) {
-  return value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) == 'object' && !(value instanceof Date) && !(value instanceof Function);
+  return value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) == 'object' && !(value instanceof Date) && !(value instanceof Function) && !(value instanceof File);
 }
 
 function processKeys(obj, fun, opts) {
diff --git a/es5/main.js b/es5/main.js
index 499a91f..2304570 100644
--- a/es5/main.js
+++ b/es5/main.js
@@ -4,7 +4,7 @@ var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol
 
 module.exports = function (algorithms) {
   function shouldProcessValue(value) {
-    return value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) == 'object' && !(value instanceof Date) && !(value instanceof Function);
+    return value && (typeof value === 'undefined' ? 'undefined' : _typeof(value)) == 'object' && !(value instanceof Date) && !(value instanceof Function) && !(value instanceof File);
   }
 
   function processKeys(obj, fun, opts) {