diff --git a/config/initializers/sentry.rb b/config/initializers/sentry.rb
index b61d6a1e..3a8276ac 100644
--- a/config/initializers/sentry.rb
+++ b/config/initializers/sentry.rb
@@ -9,4 +9,12 @@ Sentry.init do |config|
   # config.traces_sampler = lambda do |context|
   #  true
   # end
+
+  # During deployment we touch tmp/restart.txt, let's use its last access time as release.
+  # Unless someone has set a variable of course...
+  osem_version_from_file = nil
+  version_file = File.expand_path('../../tmp/restart.txt', __dir__)
+  osem_version_from_file = File.new(version_file).atime.to_i if File.file?(version_file)
+  osem_version = ENV.fetch('OSEM_SENTRY_RELEASE', osem_version_from_file)
+  config.release = osem_version if osem_version
 end