diff --git a/include/builtins.h b/include/builtins.h
index 2f90947..0fe77ae 100644
--- a/include/builtins.h
+++ b/include/builtins.h
@@ -6,7 +6,7 @@
 /*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/22 13:05:18 by adjoly            #+#    #+#             */
-/*   Updated: 2024/07/15 15:48:38 by mmoussou         ###   ########.fr       */
+/*   Updated: 2024/07/15 18:00:41 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -17,24 +17,25 @@
 
 # define PATH_MAX_LEN 4096
 
-void	ft_pwd(void);
+void			ft_pwd(void);
 
-void	ft_cd(t_env *env, char *args);
+void			ft_cd(t_env *env, char *args);
 
-void	ft_echo(char **args);
+void			ft_echo(char **args);
 
-char	*ret_cwd(void);
+char			*ret_cwd(void);
 
-void	ft_env(t_env *env);
+void			ft_env(t_env *env);
 
-void	ft_unset(char *arg, t_env *env);
+void			ft_unset(char *arg, t_env *env);
 
-void	free_exit(t_env *env, char **env_array);
-void	ft_exit(char **argv, int ac, char **env_array, t_env *env);
+void			free_exit(t_env *env, char **env_array);
+void			ft_exit(char **argv, int ac, char **env_array, t_env *env);
 
-char	**env_get_list(t_env *env);
-void	add_to_env(char *name, char *content, t_env *env);
-int		check_export_input(char *input);
-void	ft_export(char **args, t_env *env);
+char			**env_get_list(t_env *env);
+void			add_to_env(char *name, char *content, t_env *env);
+int				check_export_input(char *input);
+unsigned int	ft_arraylen(char **s);
+void			ft_export(char **args, t_env *env);
 
 #endif
diff --git a/include/parsing.h b/include/parsing.h
index 41f84dc..04319e9 100644
--- a/include/parsing.h
+++ b/include/parsing.h
@@ -3,10 +3,10 @@
 /*                                                        :::      ::::::::   */
 /*   parsing.h                                          :+:      :+:    :+:   */
 /*                                                    +:+ +:+         +:+     */
-/*   By: adjoly <adjoly@student.42angouleme.fr>     +#+  +:+       +#+        */
+/*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/25 12:20:26 by adjoly            #+#    #+#             */
-/*   Updated: 2024/07/14 13:45:22 by adjoly           ###   ########.fr       */
+/*   Updated: 2024/07/15 17:05:47 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
diff --git a/src/builtins/free_exit.c b/src/builtins/free_exit.c
index 7b144c1..f893a66 100644
--- a/src/builtins/free_exit.c
+++ b/src/builtins/free_exit.c
@@ -6,7 +6,7 @@
 /*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/07/15 12:28:36 by adjoly            #+#    #+#             */
-/*   Updated: 2024/07/15 16:07:23 by mmoussou         ###   ########.fr       */
+/*   Updated: 2024/07/15 16:22:12 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
diff --git a/src/builtins/ft_export.c b/src/builtins/ft_export.c
index 6f3bbce..65bcf3a 100644
--- a/src/builtins/ft_export.c
+++ b/src/builtins/ft_export.c
@@ -6,23 +6,13 @@
 /*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/06/26 08:42:36 by mmoussou          #+#    #+#             */
-/*   Updated: 2024/07/15 13:31:22 by mmoussou         ###   ########.fr       */
+/*   Updated: 2024/07/15 18:02:16 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "minishell.h"
 #include "builtins.h"
 
-uint	ft_arraylen(char **s)
-{
-	char	**endptr;
-
-	endptr = s;
-	while (*endptr)
-		endptr++;
-	return (endptr - s);
-}
-
 void	ft_arraysort(char **env)
 {
 	char	*tmp;
@@ -92,6 +82,32 @@ int	export_value(char *arg, t_env *env)
 	return (0);
 }
 
+int	export_append_value(char *arg, t_env *env)
+{
+	char	*name;
+	char	*content;
+	t_env	*env_t;
+
+	name = ft_calloc(sizeof(char), ft_strchr(arg, '=') - arg);
+	content = ft_calloc(sizeof(char), ft_strlen(ft_strchr(arg, '=')));
+	if (!name || !content)
+	{
+		ft_free("cc", &name, &content);
+		return (-1);
+	}
+	ft_strlcpy(name, arg, ft_strchr(arg, '=') - arg);
+	ft_strlcpy(content, ft_strchr(arg, '=') + 1,
+		ft_strlen(ft_strchr(arg, '=')) + 1);
+	env_t = env;
+	while (env_t && ft_strcmp(env_t->name, name))
+		env_t = env_t->next;
+	if (env_t)
+		env_append(name, content, env);
+	else
+		ft_envadd_back(&env, ft_envnew(name, content));
+	return (0);
+}
+
 void	ft_export(char **args, t_env *env)
 {
 	int	status;
@@ -105,7 +121,10 @@ void	ft_export(char **args, t_env *env)
 	{
 		if (!check_export_input(*args))
 		{
-			status = export_value(*args, env);
+			if (ft_strchr(*args, '=') && (ft_strchr(*args, '=') - 1)[0] == '+')
+				status = export_append_value(*args, env);
+			else
+				status = export_value(*args, env);
 			if (status)
 				return ;
 		}
diff --git a/src/builtins/ft_export_utils.c b/src/builtins/ft_export_utils.c
index fd8befa..6166166 100644
--- a/src/builtins/ft_export_utils.c
+++ b/src/builtins/ft_export_utils.c
@@ -6,12 +6,22 @@
 /*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/07/11 18:59:27 by mmoussou          #+#    #+#             */
-/*   Updated: 2024/07/15 13:33:35 by mmoussou         ###   ########.fr       */
+/*   Updated: 2024/07/15 18:02:49 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "minishell.h"
 
+unsigned int	ft_arraylen(char **s)
+{
+	char	**endptr;
+
+	endptr = s;
+	while (*endptr)
+		endptr++;
+	return (endptr - s);
+}
+
 void	env_make_str(char *str, char *name, char *content)
 {
 	if (!content)
@@ -82,6 +92,11 @@ int	check_export_input(char *input)
 	{
 		if (!ft_isalnum(input[i]) && input[i] != '_')
 		{
+			if (input[i] == '+' && input[i + 1] == '=')
+			{
+				i++;
+				continue ;
+			}
 			printf("minishell: export: '%s': not a valid identifier\n", input);
 			return (1);
 		}
diff --git a/src/exec/utils_exec_2.c b/src/exec/utils_exec_2.c
index 2b4bf1e..d147762 100644
--- a/src/exec/utils_exec_2.c
+++ b/src/exec/utils_exec_2.c
@@ -3,10 +3,10 @@
 /*                                                        :::      ::::::::   */
 /*   utils_exec_2.c                                     :+:      :+:    :+:   */
 /*                                                    +:+ +:+         +:+     */
-/*   By: adjoly <adjoly@student.42angouleme.fr>     +#+  +:+       +#+        */
+/*   By: mmoussou <mmoussou@student.42angouleme.fr  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/07/09 22:53:01 by adjoly            #+#    #+#             */
-/*   Updated: 2024/07/15 15:23:00 by adjoly           ###   ########.fr       */
+/*   Updated: 2024/07/15 17:05:33 by mmoussou         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -46,7 +46,7 @@ void	__sig(int status)
 			ft_putendl_fd("Quit (core dumped)", 2);
 		else
 			ft_putendl_fd("Quit", 2);
-	}	
+	}
 	signal(SIGQUIT, SIG_IGN);
 	signal(SIGINT, SIG_IGN);
 }