diff --git a/lib/download/download.cpp b/lib/download/download.cpp
index 5d52aa6..4a85fac 100644
--- a/lib/download/download.cpp
+++ b/lib/download/download.cpp
@@ -3,9 +3,7 @@
 #include "download.h"
 #include "device.h"
 
-HTTPClient http;
-
-bool downloadFile(String url, const char *path)
+bool downloadFile(String url, const char *path, const char* CAcert)
 {
 	// @note duration time: 200kb = 35sec write to flash
 	Serial.println("Download file: " + url);
@@ -25,14 +23,20 @@ bool downloadFile(String url, const char *path)
 		return false;
 	}
 
+	HTTPClient http;
 	http.useHTTP10(true); // http1.1 chunked is not working correctly
 	http.setTimeout(7000);
-	http.setUserAgent("paperdash esp");
+	http.setUserAgent("paperdash-epd");
 
 	// use the last 8 bytes of the unique serial id
 	http.addHeader("X-PaperDash-Id", DeviceId);
 
-	http.begin(url);
+	if (CAcert) {
+		http.begin(url, CAcert);
+	} else {
+		http.begin(url);
+	}
+
 	int httpCode = http.GET();
 	if (httpCode != HTTP_CODE_OK)
 	{
@@ -58,4 +62,10 @@ bool downloadFile(String url, const char *path)
 	http.end();
 
 	return !hasError;
+}
+
+
+bool downloadFile(String url, const char *path)
+{
+	return downloadFile(url, path, NULL);
 }
\ No newline at end of file
diff --git a/lib/download/download.h b/lib/download/download.h
index 093920a..fcef212 100644
--- a/lib/download/download.h
+++ b/lib/download/download.h
@@ -1,6 +1,7 @@
 #ifndef DOWNLOAD_H
 #define DOWNLOAD_H
 
+bool downloadFile(String url, const char *path, const char* CAcert);
 bool downloadFile(String url, const char *path);
 
 #endif
\ No newline at end of file
diff --git a/lib/face/faceCalendar.cpp b/lib/face/faceCalendar.cpp
index 60b2977..69730ef 100644
--- a/lib/face/faceCalendar.cpp
+++ b/lib/face/faceCalendar.cpp
@@ -21,8 +21,8 @@ void display_time();
 
 const char faceCalendarPicutreJson[] = "/calendarPhoto.json";
 const char faceCalendarPicture[] = "/calendarPhoto.jpg";
-const char faceCalendarPictureUrl[] = "http://us-central1-paperdash-io.cloudfunctions.net/apiImageOnRequest/390x384.jpg"; // TODO load from settings
-//const char faceCalendarPictureUrl[] = "https://paperdash.io/api/image/390x384.jpg"; // TODO load from settings
+//const char faceCalendarPictureUrl[] = "http://us-central1-paperdash-io.cloudfunctions.net/apiImageOnRequest/390x384.jpg"; // TODO load from settings
+const char faceCalendarPictureUrl[] = "https://paperdash.io/api/image/390x384.jpg"; // TODO load from settings
 
 unsigned long lastCalendarDataUpdate = 0;