diff --git a/Plague.g1a b/Plague.g1a
index 17598eb..b376a84 100644
Binary files a/Plague.g1a and b/Plague.g1a differ
diff --git a/Plague.g3a b/Plague.g3a
index cfdc7ba..1e2d87a 100644
Binary files a/Plague.g3a and b/Plague.g3a differ
diff --git a/assets/__pycache__/converters.cpython-39.pyc b/assets/__pycache__/converters.cpython-39.pyc
index 579b499..4b299ca 100644
Binary files a/assets/__pycache__/converters.cpython-39.pyc and b/assets/__pycache__/converters.cpython-39.pyc differ
diff --git a/assets/mutations_table/transmissions_2.txt b/assets/mutations_table/transmissions_2.txt
index 91b216a..e23f587 100644
--- a/assets/mutations_table/transmissions_2.txt
+++ b/assets/mutations_table/transmissions_2.txt
@@ -1,4 +1,4 @@
-1 |  2 | 15 |  0 | 6 | 5 | 0 |  0
-0 |  0 |  0 | 15 | 0 | 0 | 0 | 11
-9 | 10 |  0 |  0 | 0 | 0 | 0 | 12
-0 |  0 |  0 |  7 | 8 | 0 | 0 | 15
\ No newline at end of file
+1 |  2 | 15 |  0 | 15 | 5 | 0 |  0
+0 |  0 |  0 | 15 |  0 | 0 | 0 | 11
+9 | 10 |  0 |  0 |  0 | 0 | 0 | 12
+0 |  0 |  0 |  7 |  8 | 0 | 0 | 15
\ No newline at end of file
diff --git a/src/core.c b/src/core.c
index 833a1c4..e9df5f6 100644
--- a/src/core.c
+++ b/src/core.c
@@ -82,7 +82,7 @@ int next_frame(struct game *current_game, int *dna_animation, int *vaccine)
         if (!current_game->humans[1])
         {
             
-            if (current_game->humans[0] || current_game->humans[3] < current_game->humans[2]) message("VOUS AVEZ PERDU.");
+            if (current_game->humans[3] < 4 * (current_game->humans[0] + current_game->humans[2])) message("VOUS AVEZ PERDU.");
             else message("VOUS AVEZ GAGNE !");
             return 0;
         }
diff --git a/src/data.c b/src/data.c
index 89806a2..29a2f05 100644
--- a/src/data.c
+++ b/src/data.c
@@ -4,7 +4,7 @@
 // (contation, severity, lethality, DNA cost, change to cure requirement)
 const struct mutation symptoms_data[14] =
 {
-    {10, 10,  0,  2,  0, "NAUSEE", "DONNE DES NAUSEES"},
+    {10,  0,  0,  2,  0, "NAUSEE", "DONNE DES NAUSEES"},
     {15, 10,  0, 10,  0, "VOMISSEMENT", "PROVOQUE DES REJETS GASTRIQUES"},
     {10,  5,  0,  3,  0, "TOUX", "LA PROJECTION DE PARTICULE AUGMENTE LA CONTAGION"},
     {15, 20,  5, 10,  0, "PNEUMONIE", "AFFECTION PULMONAIRE PEU MORTELLE"},
@@ -26,9 +26,9 @@ const struct mutation abilities_data[6] =
     {15,  0,  0, 10,  0, "FROID", "RESISTANCE AU FROID"},
     {15,  0,  0, 15,  0, "CHAUD", "RESISTANCE AU CHAUD"},
     { 0, 10,  0, 25, 10, "GENETIQUE", "LE GENOME MUTE, RALENTISSANT LE SEQUENCAGE ADN"},
-    {10, 10, 20, 30, 30, "MUTATION+", "LE VIRUS MUTE, BLOQUANT LES CHERCHEURS"},
+    {10, 10, 10, 30, 30, "MUTATION+", "LE VIRUS MUTE, BLOQUANT LES CHERCHEURS"},
     {30, 10,  0, 30,  0, "ENVIRON", "LE VIRUS RESISTE AUX ENVIRONNEMENTS LES PLUS HOSTILES"},
-    { 0, 15, 30, 15, 20, "MEDICAMENT", "RESISTANCES AU MEDICAMENTS"},
+    { 0, 15, 30, 15, 20, "MEDICAMENT", "RESISTANCE AU MEDICAMENTS"},
 };
 
 
@@ -40,11 +40,11 @@ const struct mutation transmissions_data[13] =
     {40, 15, 0, 30, 0, "AEROSOL", "TRANSMISSION PAR L'AIR ET PAR L'EAU"},
     {10,  0, 0, 15, 0, "EAU 1", "TRANSMISSION PAR L'EAU"},
     {20, 10, 0, 20, 0, "EAU 2", "TRANSMISSION PAR L'EAU"},
-    {20,  0, 5, 12, 0, "ANIMAL 1", "LE VIRUS PEUT PASSER DE L'ANIMAL À L'HOMME"},
+    {20,  0, 5, 12, 0, "ANIMAL 1", "LE VIRUS PEUT PASSER DE L'ANIMAL A L'HOMME"},
     {40, 10, 0, 25, 0, "ANIMAL 2", "CAPACITE DE TRANSMISSION HOMME-ANIMAL"},
     {20,  0, 0, 15, 0, "OISEAU 1", "LES OISEAUX TRANSMETTENT LE VIRUS"},
     {40, 10, 0, 25, 0, "OISEAU 2", "LES OISEAUX TRANSMETTENT LE VIRUS"},
-    {10,  0, 0,  10, 0, "SANG 1", "LE VIRUS SE TRANSMET PAR LE SANG"},
+    {10,  0, 0, 10, 0, "SANG 1", "LE VIRUS SE TRANSMET PAR LE SANG"},
     {20, 10, 0, 15, 0, "SANG 2", "LE VIRUS SE TRANSMET PAR LE SANG"},
     {40, 15, 0, 25, 0, "SANG 3", "LE VIRUS SE TRANSMET PAR LE SANG"},
 };
diff --git a/src/epidemic_engine.c b/src/epidemic_engine.c
index 5615b17..abb77b6 100644
--- a/src/epidemic_engine.c
+++ b/src/epidemic_engine.c
@@ -42,7 +42,7 @@ void epidemic_simulation(struct game *current_game)
     init_tab(current_game->grid.width * current_game->grid.height, current_grid, current_game->grid.data);
 
     int healed_rate =  0;
-    if (current_game->research == current_game->limit) healed_rate = rand() % 11;
+    if (current_game->research == current_game->limit) healed_rate = rand() % 6;
 
     // Make the epidemic grid evolove
     for (int i = 0; i < current_game->grid.width; i ++)
diff --git a/src/main.c b/src/main.c
index 7769062..208cd58 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,7 +1,7 @@
 /*
   Project name ......: Plague
-  Version ...........: 1.3.5
-  Last modification .: 6 June 2021
+  Version ...........: 1.3.6
+  Last modification .: 7 June 2021
 
   code and assets provided with licence :
   GNU General Public Licence v3.0
@@ -20,7 +20,7 @@
 #include "mutation_engine.h"
 #include "save.h"
 
-const char *VERSION = "1.3.5";
+const char *VERSION = "1.3.6";
 
 // title_screen : display the title screen
 static void title_screen(void);
diff --git a/src/mutation_engine.c b/src/mutation_engine.c
index bdceb4e..04074e3 100644
--- a/src/mutation_engine.c
+++ b/src/mutation_engine.c
@@ -137,6 +137,7 @@ int mutation_buy(struct game *current_game, const struct cursor c, const int mut
                         // Update
                         update_disease(current_game);
                         current_game->priority += ceil((mutation_data->severity + mutation_data->lethality) / 10);
+                        current_game->limit += mutation_data->changement;
                         message("MUTATION ACHETEE");
                     }
                     else message("ACHAT IMPOSSIBLE");
@@ -169,8 +170,6 @@ void update_disease(struct game *current_game)
     current_game->severity = symptom->severity + ability->severity + transmission->severity;
     current_game->lethality = symptom->lethality + ability->lethality + transmission->lethality;
     
-    // research parameter
-    current_game->limit = RESEARCH_LIMIT + symptom->changement + ability->changement + transmission->changement;
     if (current_game->research > current_game->limit) current_game->research = current_game->limit;
 }