diff --git a/install.sh b/install.sh
index 4596f1d..adfcb54 100755
--- a/install.sh
+++ b/install.sh
@@ -3,6 +3,7 @@
 # CONSTANTS
 
 BASEDIR=$(dirname "$0")
+DEBIAN_PACKAGES="curl git build-essential libssl-dev libreadline-dev zlib1g-dev"
 
 # FUNCTIONS
 
@@ -70,7 +71,9 @@ function install_miaou_bash {
 }
 
 function install_debian_packages {
-  sudo apt-get install -y git build-essential libssl-dev libreadline-dev zlib1g-dev
+  if ! dpkg -l "$DEBIAN_PACKAGES" | tail -n +6 | grep -v ^ii; then
+    sudo apt-get install -y "$DEBIAN_PACKAGES"
+  fi
 }
 
 # MAIN