diff --git a/lib/tasks/assets.rake b/lib/tasks/assets.rake
index aa1dcadf823..8575ca11dc9 100644
--- a/lib/tasks/assets.rake
+++ b/lib/tasks/assets.rake
@@ -182,7 +182,7 @@ task 'assets:precompile' => 'assets:precompile:before' do
             STDERR.puts "Skipping: #{file} already compressed"
           else
             proc.call do
-              start = Time.now
+              start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
               STDERR.puts "#{start} Compressing: #{file}"
 
               # We can specify some files to never minify
@@ -196,7 +196,7 @@ task 'assets:precompile' => 'assets:precompile:before' do
               gzip(path)
               brotli(path)
 
-              STDERR.puts "Done compressing #{file} : #{(Time.now - start).round(2)} secs"
+              STDERR.puts "Done compressing #{file} : #{(Process.clock_gettime(Process::CLOCK_MONOTONIC) - start).round(2)} secs"
               STDERR.puts
             end
           end