diff --git a/src/common/util/options.schema.json b/src/common/util/options.schema.json
index a51c5c59cf..5993c5b1e4 100644
--- a/src/common/util/options.schema.json
+++ b/src/common/util/options.schema.json
@@ -2418,6 +2418,16 @@
               "type": "boolean",
               "default": false
             },
+            "format-version": {
+              "title": "witness.yaml.format-version",
+              "description": "YAML witness format version",
+              "type": "string",
+              "enum": [
+                "0.1",
+                "2.0"
+              ],
+              "default": "0.1"
+            },
             "entry-types": {
               "title": "witness.yaml.entry-types",
               "description": "YAML witness entry types to output/input.",
diff --git a/src/witness/yamlWitness.ml b/src/witness/yamlWitness.ml
index 2c0340a997..019ee67813 100644
--- a/src/witness/yamlWitness.ml
+++ b/src/witness/yamlWitness.ml
@@ -25,7 +25,7 @@ struct
     let uuid = Uuidm.v4_gen uuid_random_state () in
     let creation_time = TimeUtil.iso8601_now () in
     {
-      format_version = "0.1";
+      format_version = GobConfig.get_string "witness.yaml.format-version";
       uuid = Uuidm.to_string uuid;
       creation_time;
       producer;