diff --git a/elastic/logs/README.md b/elastic/logs/README.md
index d68b52bf..4d5fed01 100644
--- a/elastic/logs/README.md
+++ b/elastic/logs/README.md
@@ -221,6 +221,7 @@ The following parameters are available:
 * `lifecycle` (default: unset to fall back on Serverless detection) - Specifies the lifecycle management feature to use for data streams. Use `ilm` for index lifecycle management or `dlm` for data lifecycle management. By default, `dlm` will be used for benchmarking Serverless Elasticsearch.
 * `workflow-request-cache` (default: `true`) - Explicit control of request cache query parameter in searches executed in a workflow. This can be further overriden at an operation level with `request-cache` parameter.
 * `synthetic_source_keep` (default: unset) - Allows overriding the default synthetic source behaviour for all field types with the following values: `none` (equivalent to unset) - no source is stored, `arrays` - source stored as is only for multi-value (array) fields.
+* `source_mode` (default: unset) - Specifies the source mode to be used.
 
 ### Data Download Parameters
 
diff --git a/elastic/logs/templates/component/track-shared-logsdb-mode.json b/elastic/logs/templates/component/track-shared-logsdb-mode.json
index 05754531..8ae129fb 100644
--- a/elastic/logs/templates/component/track-shared-logsdb-mode.json
+++ b/elastic/logs/templates/component/track-shared-logsdb-mode.json
@@ -5,12 +5,17 @@
         "index": {
             "mode": {{ index_mode | tojson }}
             {% if synthetic_source_keep and synthetic_source_keep != 'none' %}
-            ,"mapping": {
-                "synthetic_source_keep": "{{ synthetic_source_keep }}"
-            }
+            ,"mapping.synthetic_source_keep": {{ synthetic_source_keep | tojson }}
             {% endif %}
         }
         {% endif %}
+      },
+      "mappings": {
+        {% if source_mode %}
+        "_source": {
+          "mode": {{ source_mode | tojson }}
+        }
+        {% endif %}
       }
     }
   }
diff --git a/elastic/security/README.md b/elastic/security/README.md
index 63594859..5e3cfcf8 100644
--- a/elastic/security/README.md
+++ b/elastic/security/README.md
@@ -85,6 +85,7 @@ The following parameters are available:
 * `corpora_uri_base` (default: `https://rally-tracks.elastic.co`) - Specify the base location of the datasets used by this track.
 * `index_mode` (default: unset) - A parameter meant to be used internally which defines one of the available indexing modes, "standard", "logsdb" or "time_series". If not set, "standard" is used.
 * `synthetic_source_keep` (default: unset) - Allows overriding the default synthetic source behaviour for all field types with the following values: `none` (equivalent to unset) - no source is stored, `arrays` - source stored as is only for multi-value (array) fields.
+* `source_mode` (default: unset) - Specifies the source mode to be used.
 
 ### Data Generation Parameters
 
diff --git a/elastic/security/templates/component/track-shared-logsdb-mode.json b/elastic/security/templates/component/track-shared-logsdb-mode.json
index adc476be..eb2b7f23 100644
--- a/elastic/security/templates/component/track-shared-logsdb-mode.json
+++ b/elastic/security/templates/component/track-shared-logsdb-mode.json
@@ -5,15 +5,20 @@
         "index": {
             "mode": {{ index_mode | tojson }},
             {% if synthetic_source_keep and synthetic_source_keep != 'none' %}
-            "mapping": {
-                "synthetic_source_keep": "{{ synthetic_source_keep }}"
-            },
+            "mapping.synthetic_source_keep": {{ synthetic_source_keep | tojson}},
             {% endif %}
             "sort.field": [ "host.hostname", "@timestamp" ],
             "sort.order": [ "asc", "desc" ],
             "sort.missing": ["_first", "_last"]
         }
         {% endif %}
+      },
+      "mappings": {
+        {% if source_mode %}
+        "_source": {
+          "mode": {{ source_mode | tojson }}
+        }
+        {% endif %}
       }
     }
   }
diff --git a/http_logs/README.md b/http_logs/README.md
index 2f0123f5..1de782f5 100644
--- a/http_logs/README.md
+++ b/http_logs/README.md
@@ -52,6 +52,7 @@ node pipeline to run. Valid options are `'baseline'` (default), `'grok'`  and `'
 * `enable_logsdb` (default: false) Determines whether the logsdb index mode gets used. If set then index sorting is configured to only use `@timestamp` field and the `source_enabled` parameter will have no effect.
 * `force_merge_max_num_segments` (default: unset): An integer specifying the max amount of segments the force-merge operation should use.
 * `synthetic_source_keep` (default: unset): If specified, configures the `index.mapping.synthetic_source_keep` index setting.
+* `source_mode` (default: unset) - Specifies the source mode to be used.
 
 ### License
 
diff --git a/http_logs/index.json b/http_logs/index.json
index 50db9088..1e696e5a 100644
--- a/http_logs/index.json
+++ b/http_logs/index.json
@@ -20,6 +20,9 @@
     {%- else %}
     "_source": {
       "enabled": {{ source_enabled | default(true) | tojson }}
+      {% if source_mode %}
+      "mode": {{ source_mode | tojson }},
+      {% endif %}
     },
     {%- endif %}
     "properties": {