diff --git a/src/pages/sign/index.tsx b/src/pages/sign/index.tsx
index 97d5d27..0f906bf 100644
--- a/src/pages/sign/index.tsx
+++ b/src/pages/sign/index.tsx
@@ -206,7 +206,10 @@ export const SignPage = () => {
     if (!selectedFile || !encryptionKey) return
 
     setIsLoading(true)
-    const arrayBuffer = await decrypt(selectedFile, encryptionKey)
+    const arrayBuffer = await decrypt(
+      selectedFile,
+      decodeURIComponent(encryptionKey)
+    )
 
     if (!arrayBuffer) return
 
@@ -478,11 +481,6 @@ export const SignPage = () => {
                 placeholder='Select file'
                 value={selectedFile}
                 onChange={(value) => setSelectedFile(value)}
-                InputProps={{
-                  inputProps: {
-                    accept: '.zip'
-                  }
-                }}
               />
 
               {selectedFile && (