diff --git a/CHANGES.rst b/CHANGES.rst
index 97605bda..734c6743 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,6 +6,7 @@ Version 0.9.3 (UNRELEASED)
 
 - Adds OpenAPI specification support for ``prune_workspace`` endpoint that allows to delete files that are neither inputs nor outputs from the workspace.
 - Adds support for ``tests.files`` in ``reana.yaml`` allowing to specify Gherking feature files for testing.
+- Changes the server OpenAPI specification to add the `maximum_interactive_session_inactivity_period` value to the `info` endpoint.
 - Changes email sending to allow configuring authentication and encryption options.
 - Fixes the verbs used to describe changes to the status of a workflow in order to avoid incorrect phrases such as ``workflow has been failed``.
 - Fixes the loading of Snakemake and CWL workflow specifications when no parameters are specified.
diff --git a/reana_commons/openapi_specifications/reana_server.json b/reana_commons/openapi_specifications/reana_server.json
index 839c1ada..3c5a91f0 100644
--- a/reana_commons/openapi_specifications/reana_server.json
+++ b/reana_commons/openapi_specifications/reana_server.json
@@ -3,7 +3,7 @@
   "info": {
     "description": "Submit workflows to be run on REANA Cloud",
     "title": "REANA Server",
-    "version": "0.9.1a1"
+    "version": "0.9.1a3"
   },
   "parameters": {},
   "paths": {
@@ -455,6 +455,18 @@
                   },
                   "type": "object"
                 },
+                "maximum_interactive_session_inactivity_period": {
+                  "properties": {
+                    "title": {
+                      "type": "string"
+                    },
+                    "value": {
+                      "type": "string",
+                      "x-nullable": true
+                    }
+                  },
+                  "type": "object"
+                },
                 "maximum_kubernetes_jobs_timeout": {
                   "properties": {
                     "title": {