diff --git a/package-lock.json b/package-lock.json
index 04a169b96..d68395ffa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
             "dependencies": {
                 "@emotion/react": "^11.14.0",
                 "@emotion/styled": "^11.14.1",
-                "@gridsuite/commons-ui": "0.270.0",
+                "@gridsuite/commons-ui": "0.271.0",
                 "@hello-pangea/dnd": "^18.0.1",
                 "@hookform/resolvers": "^4.1.3",
                 "@mui/icons-material": "^7.3.11",
@@ -3322,9 +3322,9 @@
             }
         },
         "node_modules/@gridsuite/commons-ui": {
-            "version": "0.270.0",
-            "resolved": "https://registry.npmjs.org/@gridsuite/commons-ui/-/commons-ui-0.270.0.tgz",
-            "integrity": "sha512-IdnvSuyT+l67501yEFF31eKBQMD6cnwIIyX9oaSERFxqsf2I73Vs1DAxhSm03axkzCFv8UpwPbK0dVYFuwk3AQ==",
+            "version": "0.271.0",
+            "resolved": "https://registry.npmjs.org/@gridsuite/commons-ui/-/commons-ui-0.271.0.tgz",
+            "integrity": "sha512-TZsXEW0ZSyHeMdcOV5eDaASifr8WEdLrw09+nrW1BuofLc8s6nmb1/+ayTEKolWePt+xy9oe/bRy/lAaWkDUPA==",
             "license": "MPL-2.0",
             "dependencies": {
                 "@ag-grid-community/locale": "^35.3.1",
diff --git a/package.json b/package.json
index 5eab86c48..a6218c9df 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "dependencies": {
         "@emotion/react": "^11.14.0",
         "@emotion/styled": "^11.14.1",
-        "@gridsuite/commons-ui": "0.270.0",
+        "@gridsuite/commons-ui": "0.271.0",
         "@hello-pangea/dnd": "^18.0.1",
         "@hookform/resolvers": "^4.1.3",
         "@mui/icons-material": "^7.3.11",
diff --git a/src/components/dialogs/network-modification/composite-modification/composite-modification-dialog.tsx b/src/components/dialogs/network-modification/composite-modification/composite-modification-dialog.tsx
index 8957cd355..8bae8759c 100644
--- a/src/components/dialogs/network-modification/composite-modification/composite-modification-dialog.tsx
+++ b/src/components/dialogs/network-modification/composite-modification/composite-modification-dialog.tsx
@@ -97,6 +97,10 @@ import {
     modificationByFormulaDtoToForm,
     modificationByFormulaFormToDto,
     ModificationByFormulaForm,
+    TwoWindingsTransformerForm,
+    twoWindingsTransformerCreationFormSchema,
+    twoWindingsTransformerCreationDtoToForm,
+    twoWindingsTransformerCreationFormToDto,
     staticVarCompensatorCreationFormSchema,
     staticVarCompensatorDtoToForm,
     staticVarCompensatorCreationFormToDto,
@@ -134,6 +138,7 @@ type SpecificModificationDialogProps = Pick<
     | 'ModificationForm'
     | 'isModification'
     | 'removeOptional'
+    | 'dialogWidth'
     | 'getExtraFormProps'
 >;
 
@@ -251,6 +256,20 @@ export default function CompositeModificationDialog({
                         removeOptional: true,
                     },
                 ],
+                [
+                    ModificationType.TWO_WINDINGS_TRANSFORMER_CREATION,
+                    {
+                        formSchema: twoWindingsTransformerCreationFormSchema,
+                        dtoToForm: twoWindingsTransformerCreationDtoToForm,
+                        formToDto: twoWindingsTransformerCreationFormToDto,
+                        errorHeaderId: 'TwoWindingsTransformerCreationError',
+                        titleId: 'CreateTwoWindingsTransformer',
+                        ModificationForm: TwoWindingsTransformerForm,
+                        isModification: false,
+                        removeOptional: false,
+                        dialogWidth: 'xl', // for steps table
+                    },
+                ],
                 [
                     ModificationType.LINE_CREATION,
                     {
diff --git a/src/components/dialogs/network-modification/simple-modification/ModificationDialog.tsx b/src/components/dialogs/network-modification/simple-modification/ModificationDialog.tsx
index 006393315..c33fa3ac9 100644
--- a/src/components/dialogs/network-modification/simple-modification/ModificationDialog.tsx
+++ b/src/components/dialogs/network-modification/simple-modification/ModificationDialog.tsx
@@ -18,6 +18,7 @@ import { FieldValues, useForm } from 'react-hook-form';
 import { FunctionComponent, useCallback, useEffect, useState } from 'react';
 import { yupResolver } from '@hookform/resolvers/yup';
 import { ObjectSchema } from 'yup';
+import { Breakpoint } from '@mui/material';
 
 export interface ModificationDialogProps<FormData extends FieldValues, ModificationData extends WithId> {
     open: CustomMuiDialogProps['open'];
@@ -31,6 +32,7 @@ export interface ModificationDialogProps<FormData extends FieldValues, Modificat
     errorHeaderId: string;
     isModification?: boolean;
     removeOptional?: boolean;
+    dialogWidth?: Breakpoint;
     getExtraFormProps?: (dto: ModificationData) => Record<string, unknown>;
 }
 
@@ -48,6 +50,7 @@ export function ModificationDialog<FormData extends FieldValues, ModificationDat
     dtoToForm,
     formToDto,
     errorHeaderId,
+    dialogWidth,
     isModification = false,
     removeOptional = true,
     getExtraFormProps,
@@ -103,6 +106,7 @@ export function ModificationDialog<FormData extends FieldValues, ModificationDat
             onSave={onSubmit}
             titleId={titleId}
             isDataFetching={!modificationData}
+            dialogWidth={dialogWidth}
         >
             <ModificationForm
                 isModification={isModification}