diff --git a/src/core/lv_obj_scroll.c b/src/core/lv_obj_scroll.c
index 03b028e5b4..1add20222a 100644
--- a/src/core/lv_obj_scroll.c
+++ b/src/core/lv_obj_scroll.c
@@ -91,25 +91,25 @@ void lv_obj_set_scroll_snap_y(lv_obj_t * obj, lv_scroll_snap_t align)
 
 lv_scrollbar_mode_t lv_obj_get_scrollbar_mode(const lv_obj_t * obj)
 {
-    if(obj->spec_attr) return obj->spec_attr->scrollbar_mode;
+    if(obj->spec_attr) return (lv_scrollbar_mode_t) obj->spec_attr->scrollbar_mode;
     else return LV_SCROLLBAR_MODE_AUTO;
 }
 
 lv_dir_t lv_obj_get_scroll_dir(const lv_obj_t * obj)
 {
-    if(obj->spec_attr) return obj->spec_attr->scroll_dir;
+    if(obj->spec_attr) return (lv_dir_t) obj->spec_attr->scroll_dir;
     else return LV_DIR_ALL;
 }
 
 lv_scroll_snap_t lv_obj_get_scroll_snap_x(const lv_obj_t * obj)
 {
-    if(obj->spec_attr) return obj->spec_attr->scroll_snap_x;
+    if(obj->spec_attr) return (lv_scroll_snap_t) obj->spec_attr->scroll_snap_x;
     else return LV_SCROLL_SNAP_NONE;
 }
 
 lv_scroll_snap_t lv_obj_get_scroll_snap_y(const lv_obj_t * obj)
 {
-    if(obj->spec_attr) return obj->spec_attr->scroll_snap_y;
+    if(obj->spec_attr) return (lv_scroll_snap_t) obj->spec_attr->scroll_snap_y;
     else return LV_SCROLL_SNAP_NONE;
 }
 
diff --git a/src/core/lv_obj_style.c b/src/core/lv_obj_style.c
index f232985efb..020cf3ba1c 100644
--- a/src/core/lv_obj_style.c
+++ b/src/core/lv_obj_style.c
@@ -759,7 +759,7 @@ static lv_style_res_t get_prop_core(const lv_obj_t * obj, lv_style_selector_t se
     const lv_part_t part = lv_obj_style_get_selector_part(selector);
     const lv_state_t state = lv_obj_style_get_selector_state(selector);
     const lv_state_t state_inv = ~state;
-    const bool skip_trans = obj->skip_trans;
+    const bool skip_trans = (const bool) obj->skip_trans;
     int32_t weight = -1;
     lv_style_res_t found;
     uint32_t i;
diff --git a/src/draw/sw/lv_draw_sw_box_shadow.c b/src/draw/sw/lv_draw_sw_box_shadow.c
index acaf7e1c33..67b93322c4 100644
--- a/src/draw/sw/lv_draw_sw_box_shadow.c
+++ b/src/draw/sw/lv_draw_sw_box_shadow.c
@@ -645,7 +645,7 @@ static void LV_ATTRIBUTE_FAST_MEM shadow_draw_corner_buf(const lv_area_t * coord
     int32_t x;
     lv_opa_t * res_buf = (lv_opa_t *)sh_buf;
     for(x = 0; x < size * size; x++) {
-        res_buf[x] = sh_buf[x];
+        res_buf[x] = (lv_opa_t) sh_buf[x];
     }
 #endif
 
diff --git a/src/draw/sw/lv_draw_sw_transform.c b/src/draw/sw/lv_draw_sw_transform.c
index c98a76de4f..71fadd7de8 100644
--- a/src/draw/sw/lv_draw_sw_transform.c
+++ b/src/draw/sw/lv_draw_sw_transform.c
@@ -133,7 +133,7 @@ void lv_draw_sw_transform(lv_draw_unit_t * draw_unit, const lv_area_t * dest_are
         alpha_buf = NULL;
     }
 
-    bool aa = draw_dsc->antialias;
+    bool aa = (bool) draw_dsc->antialias;
     bool is_rotated = draw_dsc->rotation;
 
     int32_t xs_ups = 0, ys_ups = 0, ys_ups_start = 0, ys_step_256_original = 0;
diff --git a/src/font/lv_binfont_loader.c b/src/font/lv_binfont_loader.c
index 3d65de9ada..f121f4048a 100644
--- a/src/font/lv_binfont_loader.c
+++ b/src/font/lv_binfont_loader.c
@@ -238,7 +238,7 @@ static bool load_cmaps_tables(lv_fs_file_t * fp, lv_font_fmt_txt_dsc_t * font_ds
 
         switch(cmap_table[i].format_type) {
             case LV_FONT_FMT_TXT_CMAP_FORMAT0_FULL: {
-                    uint8_t ids_size = sizeof(uint8_t) * cmap_table[i].data_entries_count;
+                    uint8_t ids_size = (uint8_t)(sizeof(uint8_t) * cmap_table[i].data_entries_count);
                     uint8_t * glyph_id_ofs_list = lv_malloc(ids_size);
 
                     cmap->glyph_id_ofs_list = glyph_id_ofs_list;
@@ -482,8 +482,8 @@ static bool lvgl_load_font(lv_fs_file_t * fp, lv_font_t * font)
     font->get_glyph_dsc = lv_font_get_glyph_dsc_fmt_txt;
     font->get_glyph_bitmap = lv_font_get_bitmap_fmt_txt;
     font->subpx = font_header.subpixels_mode;
-    font->underline_position = font_header.underline_position;
-    font->underline_thickness = font_header.underline_thickness;
+    font->underline_position = (int8_t) font_header.underline_position;
+    font->underline_thickness = (int8_t) font_header.underline_thickness;
 
     font_dsc->bpp = font_header.bits_per_pixel;
     font_dsc->kern_scale = font_header.kerning_scale;
diff --git a/src/font/lv_font_fmt_txt.c b/src/font/lv_font_fmt_txt.c
index 9a168bb9c7..d1d3e38bd0 100644
--- a/src/font/lv_font_fmt_txt.c
+++ b/src/font/lv_font_fmt_txt.c
@@ -243,7 +243,7 @@ static uint32_t get_glyph_dsc_id(const lv_font_t * font, uint32_t letter)
 
             if(p) {
                 lv_uintptr_t ofs = p - fdsc->cmaps[i].unicode_list;
-                glyph_id = fdsc->cmaps[i].glyph_id_start + ofs;
+                glyph_id = fdsc->cmaps[i].glyph_id_start + (uint32_t) ofs;
             }
         }
         else if(fdsc->cmaps[i].type == LV_FONT_FMT_TXT_CMAP_SPARSE_FULL) {
diff --git a/src/libs/barcode/code128.c b/src/libs/barcode/code128.c
index 88e329fa83..4fc00cb666 100644
--- a/src/libs/barcode/code128.c
+++ b/src/libs/barcode/code128.c
@@ -531,7 +531,7 @@ size_t code128_encode_raw(const char * s, char * out, size_t maxlength)
     // Compute the checksum
     int sum = codes[0];
     for(i = 1; i < num_codes; i++)
-        sum += codes[i] * i;
+        sum += (int)(codes[i] * i);
     out += code128_append_code(sum % 103, out);
 
     // Finalize the code.
diff --git a/src/libs/barcode/lv_barcode.c b/src/libs/barcode/lv_barcode.c
index d25837dfc4..ad8067d3c7 100644
--- a/src/libs/barcode/lv_barcode.c
+++ b/src/libs/barcode/lv_barcode.c
@@ -115,7 +115,7 @@ lv_result_t lv_barcode_update(lv_obj_t * obj, const char * data)
         return LV_RESULT_INVALID;
     }
 
-    int32_t barcode_w = code128_encode_gs1(data, out_buf, len);
+    int32_t barcode_w = (int32_t) code128_encode_gs1(data, out_buf, len);
     LV_LOG_INFO("barcode width = %d", (int)barcode_w);
 
     LV_ASSERT(barcode->scale > 0);