diff --git a/samples/bin/library/arial_sdf.png b/samples/bin/library/arial_sdf.png
index 68480bd6..e99b3bd2 100644
--- a/samples/bin/library/arial_sdf.png
+++ b/samples/bin/library/arial_sdf.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:043be34845f339c693797558450f05022c93c2d8f214842154ebb257e07c38b6
-size 98202
+oid sha256:ca1ca296c9b96cfccc469e1fa19f83019b95c77c564119db697595f418820440
+size 89901
diff --git a/sources/enduro2d/utils/image_impl/image_reader_stb.cpp b/sources/enduro2d/utils/image_impl/image_reader_stb.cpp
index cbac50fe..5bc23029 100644
--- a/sources/enduro2d/utils/image_impl/image_reader_stb.cpp
+++ b/sources/enduro2d/utils/image_impl/image_reader_stb.cpp
@@ -48,7 +48,7 @@ namespace
 
     image_data_format image_format_from_stb_channels(u32 channels) noexcept {
         switch ( channels ) {
-            case 1: return image_data_format::l8;
+            case 1: return image_data_format::a8;
             case 2: return image_data_format::la8;
             case 3: return image_data_format::rgb8;
             case 4: return image_data_format::rgba8;
diff --git a/sources/enduro2d/utils/image_impl/image_writer_stb.cpp b/sources/enduro2d/utils/image_impl/image_writer_stb.cpp
index 50a60768..faec106e 100644
--- a/sources/enduro2d/utils/image_impl/image_writer_stb.cpp
+++ b/sources/enduro2d/utils/image_impl/image_writer_stb.cpp
@@ -44,7 +44,7 @@ namespace
 
     bool stb_check_save_image_format(image_data_format format) noexcept {
         switch ( format ) {
-            case image_data_format::l8:
+            case image_data_format::a8:
             case image_data_format::la8:
             case image_data_format::rgb8:
             case image_data_format::rgba8:
@@ -56,7 +56,7 @@ namespace
 
     int stb_channels_from_image_format(image_data_format format) noexcept {
         switch ( format ) {
-            case image_data_format::l8: return 1;
+            case image_data_format::a8: return 1;
             case image_data_format::la8: return 2;
             case image_data_format::rgb8: return 3;
             case image_data_format::rgba8: return 4;