diff --git a/data/dictionaries/en_US.aff b/data/dictionaries/en_us.aff
similarity index 100%
rename from data/dictionaries/en_US.aff
rename to data/dictionaries/en_us.aff
diff --git a/data/dictionaries/en_US.dic b/data/dictionaries/en_us.dic
similarity index 100%
rename from data/dictionaries/en_US.dic
rename to data/dictionaries/en_us.dic