diff --git a/firmware/Makefile b/firmware/Makefile
index d31153e..6cfa63e 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -21,6 +21,11 @@ clean:
 	rm sdkconfig
 	make setup
 
+ff:
+	make test_port
+	idf.py -p $(PORT) erase-flash
+		make flash monitor
+
 all: flash monitor
 
 .PHONY: test_port setup compile flash monitor clean all
diff --git a/firmware/main/apps/wifi_analyzer/screens/wifi_screens_module.c b/firmware/main/apps/wifi_analyzer/screens/wifi_screens_module.c
index a9e159f..c9112a6 100644
--- a/firmware/main/apps/wifi_analyzer/screens/wifi_screens_module.c
+++ b/firmware/main/apps/wifi_analyzer/screens/wifi_screens_module.c
@@ -29,6 +29,8 @@ void wifi_screens_module_display_sniffer_cb(sniffer_runtime_t* sniffer) {
                              OLED_DISPLAY_INVERT);
     oled_screen_display_text(channel_str, x_offset, pkts_offset + 1,
                              OLED_DISPLAY_INVERT);
+    free(packets_str);
+    free(channel_str);
   } else {
     ESP_LOGI(TAG_WIFI_SCREENS_MODULE, "sniffer task stopped");
   }