diff --git a/examples/simple_secure_chat/main.cpp b/examples/simple_secure_chat/main.cpp
index 0dc9d4aa2..a7370b269 100644
--- a/examples/simple_secure_chat/main.cpp
+++ b/examples/simple_secure_chat/main.cpp
@@ -49,6 +49,7 @@
 #include <Adafruit_GFX.h>
 
 #include "UI/ui.h"
+#include "../src/fonts/fonts.h"
 #include "../lvgl/lvgl.h"
 
 #include "../include/externals.h"
@@ -197,12 +198,12 @@ void add_chat_bubble(lv_obj_t *list,
     lv_label_set_text(lbl_sender, sender);
     lv_obj_set_style_text_color(lbl_sender,
         is_self ? lv_color_hex(0xE3F2FD) : lv_color_hex(0x90CAF9), 0);
-    lv_obj_set_style_text_font(lbl_sender, &lv_font_montserrat_22, 0);
+    lv_obj_set_style_text_font(lbl_sender, &lv_font_arial_22, 0);
 
     lv_obj_t *lbl_time = lv_label_create(hdr);
     lv_label_set_text(lbl_time, time_str);
     lv_obj_set_style_text_color(lbl_time, lv_color_hex(0xB0B0B0), 0);
-    lv_obj_set_style_text_font(lbl_time, &lv_font_montserrat_20, 0);
+    lv_obj_set_style_text_font(lbl_time, &lv_font_arial_20, 0);
 
     // Message body (below header)
     lv_obj_t *lbl_msg = lv_label_create(bubble);
@@ -211,7 +212,7 @@ void add_chat_bubble(lv_obj_t *list,
     lv_obj_set_width(lbl_msg, lv_pct(100));
 
     lv_obj_set_style_text_color(lbl_msg, lv_color_hex(0xFFFFFF), 0);
-    lv_obj_set_style_text_font(lbl_msg, &lv_font_montserrat_26, 0);
+    lv_obj_set_style_text_font(lbl_msg, &lv_font_arial_26, 0);
 
     // Spacing between header and text
     //lv_obj_set_style_margin_top(lbl_msg, 6, 0);
@@ -261,7 +262,7 @@ void add_private_chat_bubble(lv_obj_t *list, const char *time_str, const char *m
     // Long mode για wrap
     lv_label_set_long_mode(lbl_msg, LV_LABEL_LONG_WRAP);
     lv_label_set_text(lbl_msg, msg);
-    lv_obj_set_style_text_font(lbl_msg, &lv_font_montserrat_22, 0);
+    lv_obj_set_style_text_font(lbl_msg, &lv_font_arial_22, 0);
 
     // Fixed max width για wrap
     lv_obj_set_width(lbl_msg, 400);           // max πλάτος
@@ -284,7 +285,7 @@ void add_private_chat_bubble(lv_obj_t *list, const char *time_str, const char *m
     lv_obj_t *lbl_time = lv_label_create(aligner);
     lv_label_set_text(lbl_time, time_str);
     lv_obj_set_style_text_color(lbl_time, lv_color_hex(0x808080), 0);
-    lv_obj_set_style_text_font(lbl_time, &lv_font_montserrat_14, 0);
+    lv_obj_set_style_text_font(lbl_time, &lv_font_arial_14, 0);
 
     lv_obj_scroll_to_view(row, LV_ANIM_ON);
   }
diff --git a/src/UI/ui.h b/src/UI/ui.h
index 221bb1922..b91d48379 100644
--- a/src/UI/ui.h
+++ b/src/UI/ui.h
@@ -24,6 +24,7 @@ extern "C" {
 
 #include "ui_helpers.h"
 #include "ui_events.h"
+#include "../fonts/fonts.h"
 
 // SCREEN: ui_Screen1
 void ui_Screen1_screen_init(void);
diff --git a/src/UI/ui_Screen1.c b/src/UI/ui_Screen1.c
index 7458aeb75..9d0377536 100644
--- a/src/UI/ui_Screen1.c
+++ b/src/UI/ui_Screen1.c
@@ -27,7 +27,7 @@ void ui_Screen1_screen_init(void)
     lv_obj_set_style_text_color(lv_tabview_get_tab_btns(ui_TabView1), lv_color_hex(0xFFFFFF),
                                 LV_PART_ITEMS | LV_STATE_DEFAULT);
     lv_obj_set_style_text_opa(lv_tabview_get_tab_btns(ui_TabView1), 255,  LV_PART_ITEMS | LV_STATE_DEFAULT);
-    lv_obj_set_style_text_font(lv_tabview_get_tab_btns(ui_TabView1), &lv_font_montserrat_18,
+    lv_obj_set_style_text_font(lv_tabview_get_tab_btns(ui_TabView1), &lv_font_arial_18,
                                LV_PART_ITEMS | LV_STATE_DEFAULT);
 
     ui_TabPageContacts = lv_tabview_add_tab(ui_TabView1, "Contacts");