diff --git a/converter/converter/cisu/create_case/create_case_cisu_converter.py b/converter/converter/cisu/create_case/create_case_cisu_converter.py
index 6b6415ad4..f7d7cefc3 100644
--- a/converter/converter/cisu/create_case/create_case_cisu_converter.py
+++ b/converter/converter/cisu/create_case/create_case_cisu_converter.py
@@ -175,7 +175,6 @@ def add_victim_count_to_custom_map(json_data: Dict[str, Any]):
                 key="qualification.victims.count",
                 label="Nombre de patients-victimes",
                 value=count,
-                freetext="Indique le nombre de victimes selon la nomenclature du référentiel CISU",
             )
 
             add_to_custom_map(json_data, victim_count)
@@ -194,7 +193,6 @@ def add_main_victim_to_custom_map(json_data: Dict[str, Any]):
                 key="qualification.victims.mainVictim",
                 label="Type du patient-victime principal",
                 value=main_victim,
-                freetext="Identifie le type de la principale victime (celle dont l'état de santé provoque le déclenchement de l'envoi des secours) selon la nomenclature du référentiel CISU",
             )
 
             add_to_custom_map(json_data, main_victim)
@@ -251,7 +249,9 @@ def add_to_custom_map(json_data: Dict[str, Any], custom_map_entry: CustomMap):
             if len(initial_custom_map_array) >= 3:
                 raise ValueError("The customMap already contains 3 items.")
 
-            initial_custom_map_array.append(custom_map_entry.model_dump())
+            initial_custom_map_array.append(
+                custom_map_entry.model_dump(exclude_none=True)
+            )
 
             set_value(
                 json_data,
@@ -277,7 +277,6 @@ def add_call_taker_org_to_custom_map(json_data: Dict[str, Any]):
                     key="initialalert.calltaker.organization",
                     label="Identifiant SDIS",
                     value=calltaker_org,
-                    freetext="",
                 )
 
                 add_to_custom_map(json_data, initialalert_calltaker)
diff --git a/converter/pyproject.toml b/converter/pyproject.toml
index 06e6afdc0..b4667116b 100644
--- a/converter/pyproject.toml
+++ b/converter/pyproject.toml
@@ -60,6 +60,11 @@ dev = [
     "mongomock>=4.1.2",
 ]
 
+[tool.mypy]
+plugins = [
+    "pydantic.mypy"
+]
+
 [[tool.mypy.overrides]]
 module = ["jsonpath_ng.*", "prometheus_flask_exporter.*"]
 ignore_missing_imports = true
diff --git a/converter/tests/cisu/__snapshots__/test_create_case_converter.ambr b/converter/tests/cisu/__snapshots__/test_create_case_converter.ambr
index 53c05703b..f3fd3ffd6 100644
--- a/converter/tests/cisu/__snapshots__/test_create_case_converter.ambr
+++ b/converter/tests/cisu/__snapshots__/test_create_case_converter.ambr
@@ -146,20 +146,17 @@
                     {
                       "key": "qualification.victims.count",
                       "value": "1",
-                      "label": "Nombre de patients-victimes",
-                      "freetext": "Indique le nombre de victimes selon la nomenclature du r\u00e9f\u00e9rentiel CISU"
+                      "label": "Nombre de patients-victimes"
                     },
                     {
                       "key": "qualification.victims.mainVictim",
                       "value": "ADULTE",
-                      "label": "Type du patient-victime principal",
-                      "freetext": "Identifie le type de la principale victime (celle dont l'\u00e9tat de sant\u00e9 provoque le d\u00e9clenchement de l'envoi des secours) selon la nomenclature du r\u00e9f\u00e9rentiel CISU"
+                      "label": "Type du patient-victime principal"
                     },
                     {
                       "key": "initialalert.calltaker.organization",
                       "value": "fr.health.samu440",
-                      "label": "Identifiant SDIS",
-                      "freetext": ""
+                      "label": "Identifiant SDIS"
                     }
                   ]
                 },
@@ -329,20 +326,17 @@
                     {
                       "key": "qualification.victims.count",
                       "value": "1",
-                      "label": "Nombre de patients-victimes",
-                      "freetext": "Indique le nombre de victimes selon la nomenclature du r\u00e9f\u00e9rentiel CISU"
+                      "label": "Nombre de patients-victimes"
                     },
                     {
                       "key": "qualification.victims.mainVictim",
                       "value": "ADULTE",
-                      "label": "Type du patient-victime principal",
-                      "freetext": "Identifie le type de la principale victime (celle dont l'\u00e9tat de sant\u00e9 provoque le d\u00e9clenchement de l'envoi des secours) selon la nomenclature du r\u00e9f\u00e9rentiel CISU"
+                      "label": "Type du patient-victime principal"
                     },
                     {
                       "key": "initialalert.calltaker.organization",
                       "value": "fr.health.samu440",
-                      "label": "Identifiant SDIS",
-                      "freetext": ""
+                      "label": "Identifiant SDIS"
                     }
                   ]
                 },