diff --git a/README.md b/README.md
index a9c82e1..9bf62c9 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 
 Google's Firebase Realtime Database Arduino Library for ARM/AVR WIFI Dev Boards 
-based on WiFi101 library, v 1.2.0
+based on WiFi101 library, v 1.2.1
 
 This client library provides the most reliable operations for read, store, and update the Firebase RTDB through the REST API.
 
diff --git a/library.properties b/library.properties
index 06f2bfc..14adb9d 100644
--- a/library.properties
+++ b/library.properties
@@ -1,6 +1,6 @@
 name=Firebase Arduino based on WiFi101
 
-version=1.2.0
+version=1.2.1
 
 author=Mobizt
 
diff --git a/src/Config.h b/src/Config.h
new file mode 100644
index 0000000..c9c9c08
--- /dev/null
+++ b/src/Config.h
@@ -0,0 +1,10 @@
+#ifndef FIREBASE_SSL_CLIENT
+#define FIREBASE_SSL_CLIENT
+
+#if __has_include(<WiFiNINA.h>)
+#include <WiFiNINA.h>
+#elif __has_include(<WiFi101.h>)
+#include <WiFi101.h>
+#endif
+
+#endif
\ No newline at end of file
diff --git a/src/Firebase_Arduino_WiFi101.h b/src/Firebase_Arduino_WiFi101.h
index 565575d..84596ad 100644
--- a/src/Firebase_Arduino_WiFi101.h
+++ b/src/Firebase_Arduino_WiFi101.h
@@ -1,16 +1,15 @@
-
 /**
- * Google's Firebase Realtime Database Arduino Library for ARM/AVR WIFI Dev Boards based on WiFi101 library, version 1.2.0
+ * Google's Firebase Realtime Database Arduino Library for ARM/AVR WIFI Dev Boards based on WiFi101 library, version 1.2.1
  * 
  * This library required WiFi101 Library to be installed.
  * https://github.com/arduino-libraries/WiFi101
  * 
- * Created: October 19, 2021
+ * Created: October 20, 2021
  * 
  * Feature Added:
- * - Add support 64-bit signed and unsigned integer.
  * 
  * Feature Fixed:
+ * - Fix missing file.
  * 
  * 
  * This library provides ARM/AVR WIFI Development Boards to perform REST API by GET PUT, POST, PATCH, DELETE data from/to with Google's Firebase database using get, set, update