diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/area.png b/flutter_exercise/e9_icon_fonts/assets/icons/area.png
index 0e4c1df..faa6f1c 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/area.png and b/flutter_exercise/e9_icon_fonts/assets/icons/area.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/currency.png b/flutter_exercise/e9_icon_fonts/assets/icons/currency.png
index 79cae43..40cf0aa 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/currency.png and b/flutter_exercise/e9_icon_fonts/assets/icons/currency.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/digital_storage.png b/flutter_exercise/e9_icon_fonts/assets/icons/digital_storage.png
index d7d58bd..9af76fe 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/digital_storage.png and b/flutter_exercise/e9_icon_fonts/assets/icons/digital_storage.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/length.png b/flutter_exercise/e9_icon_fonts/assets/icons/length.png
index 2fb55db..593ed8c 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/length.png and b/flutter_exercise/e9_icon_fonts/assets/icons/length.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/mass.png b/flutter_exercise/e9_icon_fonts/assets/icons/mass.png
index 5eb9bbe..9c5a737 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/mass.png and b/flutter_exercise/e9_icon_fonts/assets/icons/mass.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/power.png b/flutter_exercise/e9_icon_fonts/assets/icons/power.png
index 2878320..f842592 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/power.png and b/flutter_exercise/e9_icon_fonts/assets/icons/power.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/time.png b/flutter_exercise/e9_icon_fonts/assets/icons/time.png
index b015adb..3c8de70 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/time.png and b/flutter_exercise/e9_icon_fonts/assets/icons/time.png differ
diff --git a/flutter_exercise/e9_icon_fonts/assets/icons/volume.png b/flutter_exercise/e9_icon_fonts/assets/icons/volume.png
index ee31bf1..3412575 100644
Binary files a/flutter_exercise/e9_icon_fonts/assets/icons/volume.png and b/flutter_exercise/e9_icon_fonts/assets/icons/volume.png differ