diff --git a/platformio.ini b/platformio.ini
index 7415024d..0a7fac3f 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -58,7 +58,8 @@ lib_deps_lora =
     ;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@=3.1.0
+     ;ss_oled@=3.1.0
+     https://github.com/bitbank2/ss_oled.git#a5fbee4
      BitBang_I2C@>=1.2.0
      QRCode@>=0.0.1
 lib_deps_matrix_display =
diff --git a/src/display.cpp b/src/display.cpp
index b9bed14c..3262f290 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -57,6 +57,7 @@ const char *printmonth[] = {"xxx", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
                             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
 uint8_t DisplayIsOn = 0;
 uint8_t displaybuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
+static uint8_t plotbuf[DISPLAY_WIDTH * DISPLAY_HEIGHT / 8] = {0};
 
 QRCode qrcode;
 
@@ -298,7 +299,7 @@ void draw_page(time_t t, uint8_t page) {
 
     // page 1: pax graph
   case 1:
-    oledDumpBuffer(displaybuf);
+    oledDumpBuffer(plotbuf);
     break; // page1
 
     // page 2: GPS
@@ -502,24 +503,22 @@ void oledPlotCurve(uint16_t count, bool reset) {
     if (col < DISPLAY_WIDTH - 1) // matrix not full -> increment column
       col++;
     else // matrix full -> scroll left 1 dot
-      oledScrollBufferHorizontal(displaybuf, DISPLAY_WIDTH, DISPLAY_HEIGHT,
-                                 true);
+      oledScrollBufferHorizontal(plotbuf, DISPLAY_WIDTH, DISPLAY_HEIGHT, true);
 
   } else // clear current dot
-    oledDrawPixel(displaybuf, col, row, 0);
+    oledDrawPixel(plotbuf, col, row, 0);
 
   // scroll down, if necessary
   while ((count - v_scroll) > DISPLAY_HEIGHT - 1)
     v_scroll++;
   if (v_scroll)
-    oledScrollBufferVertical(displaybuf, DISPLAY_WIDTH, DISPLAY_HEIGHT,
-                             v_scroll);
+    oledScrollBufferVertical(plotbuf, DISPLAY_WIDTH, DISPLAY_HEIGHT, v_scroll);
 
   // set new dot
   // row = DISPLAY_HEIGHT - 1 - (count - v_scroll) % DISPLAY_HEIGHT;
   row = DISPLAY_HEIGHT - 1 - count - v_scroll;
   last_count = count;
-  oledDrawPixel(displaybuf, col, row, 1);
+  oledDrawPixel(plotbuf, col, row, 1);
 }
 
 #endif // HAS_DISPLAY
\ No newline at end of file