diff --git a/16_vigenere.lua b/14_vigenere.lua
similarity index 100%
rename from 16_vigenere.lua
rename to 14_vigenere.lua
diff --git a/14_run_length_encoding.lua b/15_run_length_encoding.lua
similarity index 100%
rename from 14_run_length_encoding.lua
rename to 15_run_length_encoding.lua
diff --git a/15_postfix.lua b/16_postfix.lua
similarity index 100%
rename from 15_postfix.lua
rename to 16_postfix.lua