diff --git a/.rubocop.yml b/.rubocop.yml
index c8a71cbc2..3decd1775 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -281,5 +281,3 @@ Lint/Loop:
   Enabled: false
 Style/For:
   Enabled: false
-Style/WhileUntilDo:
-  Enabled: false
diff --git a/lib/time_calculation.rb b/lib/time_calculation.rb
index e8666860e..8dbb030a8 100644
--- a/lib/time_calculation.rb
+++ b/lib/time_calculation.rb
@@ -137,7 +137,7 @@ put working hours matrix and timezone in function, returns UTC working hours mat
     count = 0
     calculation = true
     first_loop  = true
-    while calculation do
+    while calculation
       week_day = start_time.wday
       day      = start_time.day
       month    = start_time.month
@@ -257,7 +257,7 @@ put working hours matrix and timezone in function, returns UTC working hours mat
     count       = diff_in_min * 60
     calculation = true
     first_loop  = true
-    while calculation do
+    while calculation
       week_day = start_time.wday
       day      = start_time.day
       month    = start_time.month