diff --git a/pom.xml b/pom.xml
index 77c9479..5fae31a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 	<artifactId>lunatic-model</artifactId>
 	<packaging>jar</packaging>
 
-	<version>3.15.1</version>
+	<version>3.15.2</version>
 	<name>Lunatic Model</name>
 	<description>Classes and converters for the Lunatic model</description>
 	<url>https://inseefr.github.io/Lunatic-Model/</url>
diff --git a/src/main/java/fr/insee/lunatic/model/flat/BodyCell.java b/src/main/java/fr/insee/lunatic/model/flat/BodyCell.java
index 6776514..83d7ec7 100644
--- a/src/main/java/fr/insee/lunatic/model/flat/BodyCell.java
+++ b/src/main/java/fr/insee/lunatic/model/flat/BodyCell.java
@@ -1,6 +1,8 @@
 package fr.insee.lunatic.model.flat;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 import lombok.Getter;
 import lombok.Setter;
@@ -41,7 +43,10 @@ public class BodyCell {
     protected LabelType label;
     protected String format;
     protected String dateFormat;
-    protected String unit;
+
+    /** For input number cells. */
+    protected InputNumber.Unit unit;
+
     @JsonInclude(JsonInclude.Include.NON_EMPTY)
     protected List<Option> options;
     /** For suggester cells: Name of the code list used for auto-completion. */
@@ -74,4 +79,46 @@ public BodyCell() {
         this.optionResponses = new ArrayList<>();
     }
 
+    @JsonProperty("unit")
+    public InputNumber.Unit getUnitWrapper() {
+        return unit;
+    }
+
+    @JsonProperty("unit")
+    public void setUnit(InputNumber.Unit unit) {
+        this.unit = unit;
+    }
+
+    /** Legacy unit string property.
+     * @deprecated Use label unit. */
+    @JsonIgnore
+    @Deprecated(since = "3.15.2")
+    public String getUnit() {
+        if (unit == null)
+            return null;
+        return unit.getValue();
+    }
+
+    @JsonIgnore
+    public LabelType getUnitLabel() {
+        if (unit == null)
+            return null;
+        return unit.getLabel();
+    }
+
+    /** Legacy unit string property.
+     * @deprecated Use label unit. */
+    @JsonIgnore
+    @Deprecated(since = "3.15.2")
+    public void setUnit(String value) {
+        unit = new InputNumber.Unit();
+        unit.setValue(value);
+    }
+
+    @JsonIgnore
+    public void setUnit(LabelType labelType) {
+        unit = new InputNumber.Unit();
+        unit.setLabel(labelType);
+    }
+
 }
diff --git a/src/test/java/fr/insee/lunatic/conversion/BodyCellSerializationTest.java b/src/test/java/fr/insee/lunatic/conversion/BodyCellSerializationTest.java
index deb8d05..202087c 100644
--- a/src/test/java/fr/insee/lunatic/conversion/BodyCellSerializationTest.java
+++ b/src/test/java/fr/insee/lunatic/conversion/BodyCellSerializationTest.java
@@ -3,9 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import fr.insee.lunatic.model.flat.BodyCell;
-import fr.insee.lunatic.model.flat.ComponentTypeEnum;
-import fr.insee.lunatic.model.flat.ResponseType;
+import fr.insee.lunatic.model.flat.*;
 import org.json.JSONException;
 import org.junit.jupiter.api.Test;
 import org.skyscreamer.jsonassert.JSONAssert;
@@ -25,6 +23,21 @@ class BodyCellSerializationTest {
               }
             }""";
 
+    private final String jsonInputNumberCell = """
+            {
+              "id": "foo-id",
+              "componentType": "InputNumber",
+              "min": 0,
+              "max": 100,
+              "unit": {
+                "value": "%",
+                "type": "VTL|MD"
+              },
+              "response": {
+                "name": "FOO"
+              }
+            }""";
+
     @Test
     void serializeSuggesterCell() throws JsonProcessingException, JSONException {
         //
@@ -53,4 +66,39 @@ void deserializeSuggesterCell() throws JsonProcessingException {
         assertEquals("FOO", bodyCell.getResponse().getName());
     }
 
+    @Test
+    void serializeInputNumberCell() throws JsonProcessingException, JSONException {
+        //
+        BodyCell bodyCell = new BodyCell();
+        bodyCell.setId("foo-id");
+        bodyCell.setComponentType(ComponentTypeEnum.INPUT_NUMBER);
+        bodyCell.setMin(0d);
+        bodyCell.setMax(100d);
+        bodyCell.setUnit(new LabelType());
+        bodyCell.getUnitLabel().setValue("%");
+        bodyCell.getUnitLabel().setType(LabelTypeEnum.VTL_MD);
+        bodyCell.setResponse(new ResponseType());
+        bodyCell.getResponse().setName("FOO");
+        //
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+        String result = objectMapper.writeValueAsString(bodyCell);
+        //
+        JSONAssert.assertEquals(jsonInputNumberCell, result, JSONCompareMode.STRICT);
+    }
+
+    @Test
+    void deserializeInputNumberCell() throws JsonProcessingException {
+        //
+        BodyCell bodyCell = new ObjectMapper().readValue(jsonInputNumberCell, BodyCell.class);
+        //
+        assertEquals("foo-id", bodyCell.getId());
+        assertEquals(ComponentTypeEnum.INPUT_NUMBER, bodyCell.getComponentType());
+        assertEquals(0d, bodyCell.getMin());
+        assertEquals(100d, bodyCell.getMax());
+        assertEquals("%", bodyCell.getUnitLabel().getValue());
+        assertEquals(LabelTypeEnum.VTL_MD, bodyCell.getUnitLabel().getType());
+        assertEquals("FOO", bodyCell.getResponse().getName());
+    }
+
 }