diff --git a/core/datasource/src/main/java/com/tangem/datasource/files/AndroidFileReader.kt b/core/datasource/src/main/java/com/tangem/datasource/files/AndroidFileReader.kt
index 5957268681..fa1cd570f0 100644
--- a/core/datasource/src/main/java/com/tangem/datasource/files/AndroidFileReader.kt
+++ b/core/datasource/src/main/java/com/tangem/datasource/files/AndroidFileReader.kt
@@ -2,6 +2,7 @@ package com.tangem.datasource.files
 
 import android.content.Context
 import dagger.hilt.android.qualifiers.ApplicationContext
+import okio.use
 import javax.inject.Inject
 
 class AndroidFileReader @Inject constructor(@ApplicationContext private val context: Context) : FileReader {
@@ -16,7 +17,10 @@ class AndroidFileReader @Inject constructor(@ApplicationContext private val cont
 
     override fun rewriteFile(content: String, fileName: String) {
         context.openFileOutput(fileName, Context.MODE_PRIVATE).use { stream ->
-            stream.write(content.toByteArray(), 0, content.length)
+            stream.writer().use { writer ->
+                // warning: don't write byteArray as json, its break cyrillic encoding
+                writer.write(content)
+            }
         }
     }