diff --git a/lib/flagsmith/sdk/intervals.rb b/lib/flagsmith/sdk/intervals.rb
index 321cd76..b832f79 100644
--- a/lib/flagsmith/sdk/intervals.rb
+++ b/lib/flagsmith/sdk/intervals.rb
@@ -9,8 +9,8 @@ module Intervals
       def set_interval(delay)
         Thread.new do
           loop do
-            sleep delay
             yield if block_given?
+            sleep delay
           end
         end
       end