diff --git a/include/display.h b/include/display.h
index 8e503ce5..4d280500 100644
--- a/include/display.h
+++ b/include/display.h
@@ -4,7 +4,7 @@
 #include "cyclic.h"
 #include "qrcode.h"
 
-extern uint8_t DisplayIsOn;
+extern uint8_t DisplayIsOn, displaybuf[];
 
 void refreshTheDisplay(bool nextPage = false);
 void init_display(bool verbose = false);
diff --git a/platformio.ini b/platformio.ini
index e06eb55f..7415024d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -43,7 +43,7 @@ description = Paxcounter is a device for metering passenger flows in realtime. I
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.9.82
+release_version = 1.9.83
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
@@ -55,11 +55,10 @@ platform_espressif32 = espressif32@1.11.1
 monitor_speed = 115200
 upload_speed = 115200
 lib_deps_lora =
-    ;MCCI LoRaWAN LMIC library@>=3.1.0
+    ;MCCI LoRaWAN LMIC library@>=3.0.99 ; MCCI LMIC by Terrill Moore
     https://github.com/mcci-catena/arduino-lmic.git#5322dd1
 lib_deps_display =
-     ss_oled@=3.0.0
-     ;https://github.com/bitbank2/ss_oled.git#26f5d40
+     ss_oled@=3.1.0
      BitBang_I2C@>=1.2.0
      QRCode@>=0.0.1
 lib_deps_matrix_display =
@@ -77,8 +76,7 @@ lib_deps_basic =
     76@>=1.2.2 ; #76 Timezone by Jack Christensen
     274@>=2.3.3 ; #274 RTC by Michael Miller
     SimpleButton
-    https://github.com/lewisxhe/AXP202X_Library.git
-    ;AXP202X_Library@>=1.0.1
+    AXP202X_Library@>=1.1.0 ; AXP202 PMU lib by Lewis He
 lib_deps_all =
     ${common.lib_deps_basic}
     ${common.lib_deps_lora}
diff --git a/src/display.cpp b/src/display.cpp
index cf9f716e..b9bed14c 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -56,7 +56,7 @@ static const char TAG[] = __FILE__;
 const char *printmonth[] = {"xxx", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 uint8_t DisplayIsOn = 0;
-static uint8_t displaybuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
+uint8_t displaybuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
 
 QRCode qrcode;
 
@@ -83,7 +83,7 @@ void init_display(bool verbose) {
 #endif
 
     // set display buffer
-    //oledSetBackBuffer(displaybuf);
+    oledSetBackBuffer(displaybuf);
 
     // clear display
     oledSetContrast(DISPLAYCONTRAST);
@@ -111,7 +111,7 @@ void init_display(bool verbose) {
                                                               : "ext.");
 
       // give user some time to read or take picture
-      oledDumpBuffer(NULL);
+      oledDumpBuffer(displaybuf);
       delay(2000);
       oledFill(0x00, 1);
 #endif // VERBOSE
@@ -134,7 +134,7 @@ void init_display(bool verbose) {
         dp_printf(80, i + 3, FONT_NORMAL, 0, "%4.4s", deveui + i * 4);
 
       // give user some time to read or take picture
-      oledDumpBuffer(NULL);
+      oledDumpBuffer(displaybuf);
       delay(8000);
       oledSetContrast(DISPLAYCONTRAST);
       oledFill(0x00, 1);
@@ -178,7 +178,7 @@ void refreshTheDisplay(bool nextPage) {
     }
 
     draw_page(t, DisplayPage);
-    oledDumpBuffer(NULL);
+    oledDumpBuffer(displaybuf);
 
     I2C_MUTEX_UNLOCK(); // release i2c bus access
 
diff --git a/src/ota.cpp b/src/ota.cpp
index 087b92e7..10938b0d 100644
--- a/src/ota.cpp
+++ b/src/ota.cpp
@@ -49,6 +49,10 @@ void start_ota_update() {
 #else
   oledInit(OLED_128x64, ANGLE_FLIPY, false, -1, -1, 400000L);
 #endif
+
+  // set display buffer
+  oledSetBackBuffer(displaybuf);
+
   oledFill(0, 1);
   dp_printf(0, 0, 0, 1, "SOFTWARE UPDATE");
   dp_printf(0, 1, 0, 0, "WiFi connect  ..");
@@ -56,7 +60,7 @@ void start_ota_update() {
   dp_printf(0, 3, 0, 0, "Fetching      ..");
   dp_printf(0, 4, 0, 0, "Downloading   ..");
   dp_printf(0, 5, 0, 0, "Rebooting     ..");
-  oledDumpBuffer(NULL);
+  oledDumpBuffer(displaybuf);
 #endif
 
   ESP_LOGI(TAG, "Starting Wifi OTA update");
@@ -309,7 +313,7 @@ void ota_display(const uint8_t row, const std::string status,
     dp_printf(0, 7, 0, 0, "                ");
     dp_printf(0, 7, 0, 0, msg.substr(0, 16).c_str());
   }
-  oledDumpBuffer(NULL);
+  oledDumpBuffer(displaybuf);
 #endif
 }