diff --git a/components/lcd/Adafruit-GFX-Library/Adafruit_GFX.cpp b/components/lcd/Adafruit-GFX-Library/Adafruit_GFX.cpp
index 53c7ad3..cf50d73 100755
--- a/components/lcd/Adafruit-GFX-Library/Adafruit_GFX.cpp
+++ b/components/lcd/Adafruit-GFX-Library/Adafruit_GFX.cpp
@@ -32,7 +32,7 @@ POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "Adafruit_GFX.h"
-#include "glcdfont.c"
+#include "glcdfont.h"
 #ifdef __AVR__
   #include <avr/pgmspace.h>
 #elif defined(ESP8266) || defined(ESP32)
diff --git a/components/lcd/Adafruit-GFX-Library/glcdfont.c b/components/lcd/Adafruit-GFX-Library/glcdfont.h
similarity index 100%
rename from components/lcd/Adafruit-GFX-Library/glcdfont.c
rename to components/lcd/Adafruit-GFX-Library/glcdfont.h
diff --git a/components/lcd/iot_lcd.cpp b/components/lcd/iot_lcd.cpp
index a3a51f3..6c0606e 100644
--- a/components/lcd/iot_lcd.cpp
+++ b/components/lcd/iot_lcd.cpp
@@ -551,7 +551,7 @@ int CEspLcd::drawStringSevSeg(const char *string, uint16_t poX, uint16_t poY, ui
 
 int CEspLcd::drawNumberSevSeg(int long_num, uint16_t poX, uint16_t poY, uint8_t size)
 {
-    char tmp[10];
+    char tmp[12];
     if (long_num < 0) {
         snprintf(tmp, sizeof(tmp), "%d", long_num);
     } else {
@@ -619,7 +619,7 @@ int CEspLcd::drawString(const char *string, uint16_t x, uint16_t y)
 
 int CEspLcd::drawNumber(int long_num, uint16_t poX, uint16_t poY)
 {
-    char tmp[10];
+    char tmp[12];
     if (long_num < 0) {
         snprintf(tmp, sizeof(tmp), "%d", long_num);
     } else {