diff --git a/lib/knapsack/tracker.rb b/lib/knapsack/tracker.rb
index a973238..befbe46 100644
--- a/lib/knapsack/tracker.rb
+++ b/lib/knapsack/tracker.rb
@@ -81,11 +81,7 @@ def report_distributor
     end
 
     def now_without_mock_time
-      if defined?(Timecop)
-        Time.now_without_mock_time
-      else
-        Time.raw_now
-      end
+      Process.clock_gettime(Process::CLOCK_MONOTONIC)
     end
   end
 end