diff --git a/bin/d1_required.dsk b/bin/d01_required.dsk
similarity index 100%
rename from bin/d1_required.dsk
rename to bin/d01_required.dsk
diff --git a/bin/d2_stdio.dsk b/bin/d02_stdio.dsk
similarity index 100%
rename from bin/d2_stdio.dsk
rename to bin/d02_stdio.dsk
diff --git a/bin/d3_arrays.dsk b/bin/d03_arrays.dsk
similarity index 100%
rename from bin/d3_arrays.dsk
rename to bin/d03_arrays.dsk
diff --git a/bin/d4_math.dsk b/bin/d04_math.dsk
similarity index 100%
rename from bin/d4_math.dsk
rename to bin/d04_math.dsk
diff --git a/bin/d5_strings.dsk b/bin/d05_strings.dsk
similarity index 100%
rename from bin/d5_strings.dsk
rename to bin/d05_strings.dsk
diff --git a/bin/d6_filesDOS.dsk b/bin/d06_filesDOS.dsk
similarity index 100%
rename from bin/d6_filesDOS.dsk
rename to bin/d06_filesDOS.dsk
diff --git a/bin/d7_convert.dsk b/bin/d07_convert.dsk
similarity index 100%
rename from bin/d7_convert.dsk
rename to bin/d07_convert.dsk
diff --git a/bin/d8_lores.dsk b/bin/d08_lores.dsk
similarity index 100%
rename from bin/d8_lores.dsk
rename to bin/d08_lores.dsk
diff --git a/bin/d9_hires.dsk b/bin/d09_hires.dsk
similarity index 100%
rename from bin/d9_hires.dsk
rename to bin/d09_hires.dsk