diff --git a/README.md b/README.md
index 1639bc5..3ed830c 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Prerequis
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-* php,mysql, php mbstring
+* php,mysql, php mbstring (apt install php-mbstring)
 * librairie mysqli
 
 Installation base mysql