diff --git a/data/software-tools/sphinx.json b/data/software-tools/sphinx.json
index 13df1837..18aa9ff9 100644
--- a/data/software-tools/sphinx.json
+++ b/data/software-tools/sphinx.json
@@ -8,10 +8,19 @@
   },
   "appliesToProgrammingLanguage": ["Python"],
   "description": "Documentation generator that creates comprehensive, searchable documentation from source code and reStructuredText files, improving research software maintainability and usability through professional documentation.",
-  "hasQualityDimension": { "@id": "dim:maintainability", "@type": "@id" },
+  "hasQualityDimension": {
+    "@id": "dim:maintainability",
+    "@type": "@id"
+  },
   "howToUse": ["command-line", "CI/CD"],
   "isAccessibleForFree": true,
   "license": "https://spdx.org/licenses/BSD-2-Clause",
   "name": "sphinx",
-  "url": "https://www.sphinx-doc.org"
+  "url": "https://www.sphinx-doc.org",
+  "improvesQualityIndicator": [
+    {
+      "@id": "https://w3id.org/everse/i/indicators/software_has_documentation",
+      "@type": "@id"
+    }
+  ]
 }