diff --git a/instrumentation/rails/lib/opentelemetry/instrumentation/rails/instrumentation.rb b/instrumentation/rails/lib/opentelemetry/instrumentation/rails/instrumentation.rb
index 07057de92..c928c0192 100644
--- a/instrumentation/rails/lib/opentelemetry/instrumentation/rails/instrumentation.rb
+++ b/instrumentation/rails/lib/opentelemetry/instrumentation/rails/instrumentation.rb
@@ -24,7 +24,7 @@ class Instrumentation < OpenTelemetry::Instrumentation::Base
         private
 
         def gem_version
-          ::Rails.version
+          ::Rails.gem_version
         end
       end
     end