diff --git a/Plague.g1a b/Plague.g1a
index 7b2250b..8e0d7ae 100644
Binary files a/Plague.g1a and b/Plague.g1a differ
diff --git a/src/data.c b/src/data.c
index 1d024a6..b96be2d 100644
--- a/src/data.c
+++ b/src/data.c
@@ -6,18 +6,18 @@ const struct mutation symptoms_data[14] =
 {
     {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"},
-    { 0, 30, 20, 15, 10, "TUMEUR", "PEU CONTAGIEUX, MAIS MORTEL"},
-    {15, 10,  5,  4,  0, "PLAIES", "LA PEAU S'ASSECHE ET DEVIENT CASSANTE"},
-    {10, 10, 10, 10,  0, "LESIONS", "BLOQUE LA CICATRISATION"},
-    {30, 20, 20, 20,  5, "HEMORRAGIE", "BLOQUE L'ACTION DES PLAQUETTES"},
-    {25, 15, 10, 17,  0, "INFECTION", "CREER DES FOYERS D'INFECTION DANS LE CORPS"},
+    {10,  0,  0,  3,  0, "TOUX", "LA PROJECTION DE PARTICULE AUGMENTE LA CONTAGION"},
+    {15, 10,  5, 10,  0, "PNEUMONIE", "AFFECTION PULMONAIRE PEU MORTELLE"},
+    { 0, 20, 20, 15, 10, "TUMEUR", "PEU CONTAGIEUX, MAIS MORTEL"},
+    {15,  0,  5,  4,  0, "PLAIES", "LA PEAU S'ASSECHE ET DEVIENT CASSANTE"},
+    {10,  5, 10, 10,  0, "LESIONS", "BLOQUE LA CICATRISATION"},
+    {30, 10, 20, 20,  5, "HEMORRAGIE", "BLOQUE L'ACTION DES PLAQUETTES"},
+    {25, 10, 10, 17,  0, "INFECTION", "CREER DES FOYERS D'INFECTION DANS LE CORPS"},
     {15, 10,  5,  5,  0, "INFLAMMATION", "PROVOQUE DES ROUGEURS ET DEMANGEAISONS"},
     {10, 15, 20, 15,  0, "IMMUNITE", "BLOQUE L'ACTION DU SYSTEME IMMUNITAIRE"},
     { 0, 20,  0, 15,  10, "PARANOIA", "LES CHERCHEURS N'ARRIVENT PLUS A COOPERER ENTRE EUX"},
     { 0, 15, 15, 20,  10, "FOLIE", "PROVOQUE DES CRISES D'HYSTERIES"},
-    { 0, 30, 30, 30,  20, "ARRET TOTAL", "EMPECHE LES ORGANES DE FONCTIONNER"},
+    { 0, 10, 30, 30,  20, "ARRET TOTAL", "EMPECHE LES ORGANES DE FONCTIONNER"},
 };
 
 
diff --git a/src/main.c b/src/main.c
index 7064f61..71809ff 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,6 @@
 /*
   Project name ......: Plague
-  Version ...........: 1.3.7
+  Version ...........: 1.3.8
   Last modification .: 8 June 2021
 
   code and assets provided with licence :
@@ -20,7 +20,7 @@
 #include "mutation_engine.h"
 #include "save.h"
 
-const char *VERSION = "1.3.7";
+const char *VERSION = "1.3.8";
 
 // title_screen : display the title screen
 static void title_screen(void);
diff --git a/src/mutation_engine.h b/src/mutation_engine.h
index 8b2ec28..0a31ef0 100644
--- a/src/mutation_engine.h
+++ b/src/mutation_engine.h
@@ -5,7 +5,7 @@
 #include "display_engine.h"
 
 // Basic limit research
-#define RESEARCH_LIMIT 300
+#define RESEARCH_LIMIT 200
 
 // mutation_table : contain the map of the mutation available
 struct mutation_table