diff --git a/chapter-01/temperature-io/Makefile b/chapter-01/1-temperature-io/Makefile
similarity index 100%
rename from chapter-01/temperature-io/Makefile
rename to chapter-01/1-temperature-io/Makefile
diff --git a/chapter-01/temperature-io/main.c b/chapter-01/1-temperature-io/main.c
similarity index 100%
rename from chapter-01/temperature-io/main.c
rename to chapter-01/1-temperature-io/main.c