diff --git a/ec2.tf b/ec2.tf
index fc4dd62..ba8e20c 100644
--- a/ec2.tf
+++ b/ec2.tf
@@ -1,6 +1,6 @@
 resource "aws_instance" "myec2" {
-  ami                    = "ami-08df646e18b182346"
-  instance_type          = "t2.micro"
+  ami                    = var.ami
+  instance_type          = var.instance_type
   availability_zone = "ap-south-1a"
   vpc_security_group_ids = [aws_security_group.allow_tls.id]
   key_name = "pswain"
diff --git a/variable.tf b/variable.tf
new file mode 100644
index 0000000..1968145
--- /dev/null
+++ b/variable.tf
@@ -0,0 +1,7 @@
+variable "ami" {
+  default = "ami-08df646e18b182346"
+}
+
+variable "instance_type" {
+  default = "t2.micro"
+}