diff --git a/src/main/libs/clients/MySQLClient.js b/src/main/libs/clients/MySQLClient.js
index 7d60c64f..43cdc5d7 100644
--- a/src/main/libs/clients/MySQLClient.js
+++ b/src/main/libs/clients/MySQLClient.js
@@ -286,7 +286,7 @@ export class MySQLClient extends AntaresCore {
                      break;
                }
 
-               const tableSize = table.Data_length + table.Index_length;
+               const tableSize = Number(table.Data_length) + Number(table.Index_length);
                schemaSize += tableSize;
 
                return {
diff --git a/src/main/libs/clients/PostgreSQLClient.js b/src/main/libs/clients/PostgreSQLClient.js
index ed7ec319..d666bccd 100644
--- a/src/main/libs/clients/PostgreSQLClient.js
+++ b/src/main/libs/clients/PostgreSQLClient.js
@@ -238,7 +238,7 @@ export class PostgreSQLClient extends AntaresCore {
          if (schemas.has(db.database)) {
             // TABLES
             const remappedTables = tablesArr.filter(table => table.Db === db.database).map(table => {
-               const tableSize = +table.data_length + table.index_length;
+               const tableSize = Number(table.data_length) + Number(table.index_length);
                schemaSize += tableSize;
 
                return {