diff --git a/README.md b/README.md
index 88c1cf0..e5f84cd 100644
--- a/README.md
+++ b/README.md
@@ -13,8 +13,8 @@ Projet Techno
 | [game_nb_rows](./game_ext.c#L?)              | [uint game_nb_rows(cgame g);](./game_ext.h#L43-59)                            | @nnunes  |       | <ul><li>[ ] </li></ul> |
 | [game_nb_cols](./game_ext.c#L?)              | [uint game_nb_cols(cgame g);](./game_ext.h#L51-57)                            | @nnunes  |       | <ul><li>[ ] </li></ul> |
 | [game_is_wrapping](./game_ext.c#L?)              | [bool game_is_wrapping(cgame g);](./game_ext.h#L59-64)                            | @nnunes  |       | <ul><li>[ ] </li></ul> |
-| [game_undo](./game_ext.c#L?)              | [void game_undo(game g);](./game_ext.h#L66-75)                            | @thperrier  |       | <ul><li>[ ] </li></ul> |
-| [game_redo](./game_ext.c#L?)              | [void game_redo(game g);](./game_ext.h#L77-86)                            | @thperrier  |       | <ul><li>[ ] </li></ul> |
+| [game_undo](./game_ext.c#L?)              | [void game_undo(game g);](./game_ext.h#L66-75)                            | @thperrier  |       | <ul><li>[X] </li></ul> |
+| [game_redo](./game_ext.c#L?)              | [void game_redo(game g);](./game_ext.h#L77-86)                            | @thperrier  |       | <ul><li>[X] </li></ul> |
 
 ## game.c
 
diff --git a/game_ext.c b/game_ext.c
index 9dca5b1..6d58039 100644
--- a/game_ext.c
+++ b/game_ext.c
@@ -64,9 +64,15 @@ void game_undo(game g) {
 	game_update_flags(g);
 	g->hist = history_prev(g->hist);
 	}
-	return;
 }
 
 void game_redo(game g) {
-	return;
+	if (history_next(g->hist) == NULL){
+		printf("waiting for you to undo first");
+	}
+	else{
+	game_set_square(g, history_i(history_next(g->hist)), history_j(history_next(g->hist)), history_state(history_next(g->hist)));
+	game_update_flags(g);
+	g->hist = history_next(g->hist);
+	}
 }
\ No newline at end of file