diff --git a/install.sh b/install.sh
index 27bca6d..9e53c52 100755
--- a/install.sh
+++ b/install.sh
@@ -1,4 +1,8 @@
 #!/bin/bash
+if ! hash dialog 2>/dev/null; then
+    echo "dialog is not installed"
+    exit
+fi
 
 working() {
 	tskpid=$!