diff --git a/Inc/common_defines.h b/Inc/common_defines.h
index 25ee613..76429ce 100644
--- a/Inc/common_defines.h
+++ b/Inc/common_defines.h
@@ -11,7 +11,7 @@
 
 //#define DEBUG
 
-#define FIRMWARE_VERSION					0x1342			// v1.3.4b2
+#define FIRMWARE_VERSION					0x1343			// v1.3.4b3
 #define USED_PINS_NUM							30					// constant for BluePill and BlackPill boards
 #define MAX_AXIS_NUM							8						// max 8
 #define MAX_BUTTONS_NUM						128					// power of 2, max 128
diff --git a/Inc/main.h b/Inc/main.h
index 69287cf..a6ee54f 100644
--- a/Inc/main.h
+++ b/Inc/main.h
@@ -18,7 +18,7 @@
 
 static const dev_config_t init_config =
 {
-	.firmware_version = 0x1342,		// do not change
+	.firmware_version = 0x1343,		// do not change
 	
 	/* 
 		Name of device in devices dispatcher
diff --git a/MDK-ARM/FreeJoy.bin b/MDK-ARM/FreeJoy.bin
index 6a7db9a..6dc25ed 100644
Binary files a/MDK-ARM/FreeJoy.bin and b/MDK-ARM/FreeJoy.bin differ
diff --git a/Src/analog.c b/Src/analog.c
index 6c423cf..28547ae 100644
--- a/Src/analog.c
+++ b/Src/analog.c
@@ -475,9 +475,9 @@ void AxesProcess (dev_config_t * p_dev_config)
 			
 			axes_buttons[i][0].current_state = buttons_state[p_dev_config->axis_config[i].decrement_button].current_state;
 			axes_buttons[i][1].current_state = buttons_state[p_dev_config->axis_config[i].increment_button].current_state;
-			axes_buttons[i][2].current_state = buttons_state[p_dev_config->axis_config[i].center_button].current_state;
+			axes_buttons[i][2].current_state = buttons_state[p_dev_config->axis_config[i].center_button].current_state;			
 			
-      			// decrement
+      // decrement
       if (axes_buttons[i][0].current_state && !axes_buttons[i][0].prev_state)
       {
         tmp32 -= AXIS_FULLSCALE * p_dev_config->axis_config[i].step / 255;
@@ -500,7 +500,7 @@ void AxesProcess (dev_config_t * p_dev_config)
 			}
 			
 			// center
-      if (axes_buttons[i][2].current_state && !axes_buttons[i][2].prev_state)
+      if (axes_buttons[i][2].current_state)
       {
         tmp32 = AXIS_CENTER_VALUE;
       }
diff --git a/Src/buttons.c b/Src/buttons.c
index e9b8c9f..7ab3161 100644
--- a/Src/buttons.c
+++ b/Src/buttons.c
@@ -717,7 +717,7 @@ void ButtonsReadLogical (dev_config_t * p_dev_config)
 				// prevent not atomic read
 				NVIC_DisableIRQ(TIM1_UP_IRQn);
 				
-				buttons_data[(i & 0xF8)>>3] &= ~(1 << (i & 0x07));
+				buttons_data[(k & 0xF8)>>3] &= ~(1 << (k & 0x07));
 				buttons_data[(k & 0xF8)>>3] |= (buttons_state[i].current_state << (k & 0x07));
 				k++;