diff --git a/losungepaper.ino b/losungepaper.ino
index 0f0f3c9..96ec5e5 100755
--- a/losungepaper.ino
+++ b/losungepaper.ino
@@ -6,6 +6,7 @@
 #define UNCOLORED   1
 
 Epd epd;
+int DEEP_SLEEP_TIME_uS = 6 * 60 * 60 * 1000 * 1000;  // time to deep sleep in microseconds (not milliseconds!)
 
 // WiFi
 char wiFiSSID[] = "SSID";  // SSID of your network
@@ -41,6 +42,11 @@ void setup() {
   String html = getHTML();
 
   showDailyText(getLosungFromHTML(html), getLehrtextFromHTML(html), getLosungSourceFromHTML(html), getLehrtextSourceFromHTML(html));
+
+  // deep sleep for 6 hours
+  esp_sleep_enable_timer_wakeup(DEEP_SLEEP_TIME_uS);
+  Serial.printf("[ESP32] Going to deep sleep mode.\n");
+  esp_deep_sleep_start();  
 }
 
 void loop() {