diff --git a/README.md b/README.md
index 1d1d2a6..0cf87b1 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,8 @@ PrayTime use the api on aladhan.com to retriew timings.
 
 ## Prerequisites
 
+valac curl meson ninja glib gobject json-glib gstreamer
+
 see meson.build 
 
 ```
@@ -17,8 +19,15 @@ json_dep      = dependency('json-glib-1.0')
 gstreamer_dep = dependency('gstreamer-1.0')
 ```
 
+on debian or debian like you can do :
+```
+$ sudo apt-get install valac libjson-glib-dev libgstreamer1.0-dev meson ninja-build
+```
+
 ## Install
 
+git clone the project then cd to project and do :
+
 ```
 meson --prefix=/usr ./ build
 sudo ninja install -C build
diff --git a/config/praytime.ini b/config/praytime.ini
index bc3f41d..5841421 100644
--- a/config/praytime.ini
+++ b/config/praytime.ini
@@ -7,7 +7,7 @@ latitudeAdjustmentMethod = 3
 
 [Volumes]
 # you can use same volume for all prayer
-default                 = 1.00
+default                  = 1.00
 # or adjust volume to specific prayer
 fajr                     = 0.30
 dhuhr                    = 0.70