diff --git a/README.md b/README.md
index f3207b3..a0c3ed3 100644
--- a/README.md
+++ b/README.md
@@ -177,6 +177,15 @@ chain_network_path = {
 chain_network_icon = {
     "mychain" = "_test_network_icon.html"
 }
+heart_beat_timeout = {
+    "mychain" = 30
+}
+heart_command = {
+    "mychain" = "systemctl restart explorer.service"
+}
+blockscout_version = {
+    "mychain" = "v1.3.0-beta"
+}
 ```
 
 This will ensure that those chains are used when provisioning the infrastructure.
diff --git a/main/main.tf b/main/main.tf
index 956e5cf..e2c2c1f 100644
--- a/main/main.tf
+++ b/main/main.tf
@@ -23,6 +23,9 @@ module "stack" {
   chain_subnetwork         = "${var.chain_subnetwork}"
   chain_network_path       = "${var.chain_network_path}"
   chain_network_icon       = "${var.chain_network_icon}"
+  chain_heart_beat_timeout = "${var.chain_heart_beat_timeout}"
+  chain_heart_command      = "${var.chain_heart_command}"
+  chain_blockscout_version = "${var.chain_blockscout_version}"
 
   vpc_cidr           = "${var.vpc_cidr}"
   public_subnet_cidr = "${var.public_subnet_cidr}"
diff --git a/main/variables.tf b/main/variables.tf
index a624285..65fbb7b 100644
--- a/main/variables.tf
+++ b/main/variables.tf
@@ -25,7 +25,7 @@ variable "dns_zone_name" {
 
 variable "instance_type" {
   description = "The EC2 instance type to use for app servers"
-  default     = "m5.xlarge"
+  default     = "m5.large"
 }
 
 variable "root_block_size" {
@@ -41,21 +41,21 @@ variable "pool_size" {
 variable "chains" {
   description = "A map of chain names to urls"
   default = {
-    "sokol" = "https://sokol-trace.poa.network"
+    "sokol" = "http://localhost:8545"
   }
 }
 
 variable "chain_trace_endpoint" {
   description = "A map of chain names to RPC tracing endpoint"
   default = {
-    "sokol" = "https://sokol-trace.poa.network"
+    "sokol" = "http://localhost:8545"
   }
 }
 
 variable "chain_ws_endpoint" {
   description = "A map of chain names to Websocket RPC Endpoint"
   default = {
-    "sokol" = "wss://sokol-ws.poa.network/ws"
+    "sokol" = "ws://localhost:8546"
   }
 }
 
@@ -108,6 +108,25 @@ variable "chain_network_icon" {
   }
 }
 
+variable "chain_heart_beat_timeout" {
+  description = "A map of the chain heart beat timeout number"
+  default = {
+    "sokol" = 30
+  }
+}
+variable "chain_heart_command" {
+  description = "A map of chain heart beat command"
+  default = {
+    "sokol" = "systemctl restart explorer.service"
+  }
+}
+variable "chain_blockscout_version" {
+  description = "A map of the blockscout version"
+  default = {
+    "sokol" = "v1.3.0-beta"
+  }
+}
+
 # RDS/Database configuration
 variable "db_id" {
   description = "The identifier for the RDS database"
diff --git a/modules/stack/config.tf b/modules/stack/config.tf
index 6975fa6..0bbe07f 100644
--- a/modules/stack/config.tf
+++ b/modules/stack/config.tf
@@ -94,6 +94,27 @@ resource "aws_ssm_parameter" "network_icon" {
   type  = "String"
 }
 
+resource "aws_ssm_parameter" "heart_beat_timeout" {
+  count = "${length(var.chains)}"
+  name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/heart_beat_timeout"
+  value = "${element(values(var.chain_heart_beat_timeout),count.index)}"
+  type  = "String"
+}
+
+resource "aws_ssm_parameter" "heart_command" {
+  count = "${length(var.chains)}"
+  name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/heart_command"
+  value = "${element(values(var.chain_heart_command),count.index)}"
+  type  = "String"
+}
+
+resource "aws_ssm_parameter" "blockscout_version" {
+  count = "${length(var.chains)}"
+  name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/blockscout_version"
+  value = "${element(values(var.chain_blockscout_version),count.index)}"
+  type  = "String"
+}
+
 resource "aws_ssm_parameter" "exq_blocks_concurrency" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/exq_blocks_concurrency"
diff --git a/modules/stack/variables.tf b/modules/stack/variables.tf
index 74e71a5..4e164cb 100644
--- a/modules/stack/variables.tf
+++ b/modules/stack/variables.tf
@@ -40,6 +40,16 @@ variable "chain_network_icon" {
   default = {}
 }
 
+variable "chain_heart_beat_timeout" {
+  default = {}
+}
+variable "chain_heart_command" {
+  default = {}
+}
+variable "chain_blockscout_version" {
+  default = {}
+}
+
 variable "db_id" {}
 variable "db_name" {}
 variable "db_username" {}