diff --git a/config/locales/devise.fr_informal.yml b/config/locales/devise.fr-informal.yml
similarity index 99%
rename from config/locales/devise.fr_informal.yml
rename to config/locales/devise.fr-informal.yml
index f167d4706..9578af9d9 100644
--- a/config/locales/devise.fr_informal.yml
+++ b/config/locales/devise.fr-informal.yml
@@ -3,7 +3,7 @@
 #   the COPYRIGHT file.
 
 
-fr_informal:
+fr-informal:
   errors:
     messages:
       not_found: "introuvable"
diff --git a/config/locales/fr_informal.yml b/config/locales/fr-informal.yml
similarity index 99%
rename from config/locales/fr_informal.yml
rename to config/locales/fr-informal.yml
index 60240fe04..627674ca5 100644
--- a/config/locales/fr_informal.yml
+++ b/config/locales/fr-informal.yml
@@ -6,7 +6,7 @@
 # Localization file for French (Informal Honorifics). Add more files in this directory for other locales.
 # See http://github.com/svenfuchs/rails-i18n/tree/master/rails%2Flocale for starting points.
 
-fr_informal:
+fr-informal:
   hello: "Bonjour tout le monde"
   application:
       helper: