diff --git a/CHANGELOG.md b/CHANGELOG.md
index 43a8e4e..9c57458 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog for DS API rubygem
 
+## 1.5.4 - 2025-04
+
+- (Jon) Adds returned row count to logs when the count is a positive integer.
+  [GH-272](https://github.com/epimorphics/ppd-explorer/issues/272)
+
 ## 1.5.3 - 2025-04
 
 - (Jon) Improved API request logging with query string information, which can
diff --git a/lib/data_services_api/service.rb b/lib/data_services_api/service.rb
index bde2d24..f5842de 100644
--- a/lib/data_services_api/service.rb
+++ b/lib/data_services_api/service.rb
@@ -77,6 +77,7 @@ def get_json(http_url, params, options) # rubocop:disable Metrics/MethodLength,
       )
 
       logged_fields[:method] = response.env.method.upcase
+      logged_fields[:returned_rows] = returned_rows if returned_rows.positive?
       logged_fields[:request_status] = 'processing'
       logged_fields[:request_time] = elapsed_time
       logged_fields[:status] = response.status
diff --git a/lib/data_services_api/version.rb b/lib/data_services_api/version.rb
index 9c4d4eb..931f421 100644
--- a/lib/data_services_api/version.rb
+++ b/lib/data_services_api/version.rb
@@ -4,7 +4,7 @@
 module DataServicesApi
   MAJOR = 1
   MINOR = 5
-  PATCH = 3
+  PATCH = 4
   SUFFIX = nil
   VERSION = "#{MAJOR}.#{MINOR}.#{PATCH}#{SUFFIX && ".#{SUFFIX}"}"
 end