diff --git a/.circleci/config.yml b/.circleci/config.yml
index f410162b48..b3abd48786 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ jobs:
   build:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0-node-browsers
+      - image: circleci/elixir:1.9.1-node-browsers
         environment:
           MIX_ENV: test
           # match POSTGRES_PASSWORD for postgres image below
@@ -129,7 +129,7 @@ jobs:
   check_formatted:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
@@ -143,7 +143,7 @@ jobs:
   credo:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
@@ -177,7 +177,7 @@ jobs:
   dialyzer:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
@@ -247,7 +247,7 @@ jobs:
   gettext:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
@@ -286,7 +286,7 @@ jobs:
   release:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: prod
 
@@ -312,7 +312,7 @@ jobs:
   sobelow:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
@@ -336,7 +336,7 @@ jobs:
   test_geth_http_websocket:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0-node-browsers
+      - image: circleci/elixir:1.9.1-node-browsers
         environment:
           MIX_ENV: test
           # match POSTGRES_PASSWORD for postgres image below
@@ -390,7 +390,7 @@ jobs:
   test_geth_mox:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0-node-browsers
+      - image: circleci/elixir:1.9.1-node-browsers
         environment:
           MIX_ENV: test
           # match POSTGRES_PASSWORD for postgres image below
@@ -444,7 +444,7 @@ jobs:
   test_parity_http_websocket:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0-node-browsers
+      - image: circleci/elixir:1.9.1-node-browsers
         environment:
           MIX_ENV: test
           # match POSTGRES_PASSWORD for postgres image below
@@ -498,7 +498,7 @@ jobs:
   test_parity_mox:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0-node-browsers
+      - image: circleci/elixir:1.9.1-node-browsers
         environment:
           MIX_ENV: test
           # match POSTGRES_PASSWORD for postgres image below
@@ -552,7 +552,7 @@ jobs:
   coveralls_merge:
     docker:
       # Ensure .tool-versions matches
-      - image: circleci/elixir:1.9.0
+      - image: circleci/elixir:1.9.1
         environment:
           MIX_ENV: test
 
diff --git a/.tool-versions b/.tool-versions
index 71379b2fa7..785ba751f8 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
-elixir 1.9
-erlang 21.0.4
+elixir 1.9.1-otp-22
+erlang 22.0
 nodejs 10.11.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a608f45e2..532942d2e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#2458](https://github.com/poanetwork/blockscout/pull/2458) - Add LAST_BLOCK var to add ability indexing in the range of blocks
 - [#2456](https://github.com/poanetwork/blockscout/pull/2456) - fetch pending transactions for geth
 
 ### Fixes
@@ -9,6 +10,7 @@
 
 ### Chore
 - [#2492](https://github.com/poanetwork/blockscout/pull/2492) - hide decoded row if event is not decoded
+- [#2402](https://github.com/poanetwork/blockscout/pull/2402) - bump otp version to 22.0
 - [#2432](https://github.com/poanetwork/blockscout/pull/2432) - bump credo version
 - [#2457](https://github.com/poanetwork/blockscout/pull/2457) - update mix.lock
 - [#2435](https://github.com/poanetwork/blockscout/pull/2435) - Replace deprecated extract-text-webpack-plugin with mini-css-extract-plugin
diff --git a/apps/indexer/config/config.exs b/apps/indexer/config/config.exs
index 4e84e9bcfe..9ab951d668 100644
--- a/apps/indexer/config/config.exs
+++ b/apps/indexer/config/config.exs
@@ -35,7 +35,8 @@ config :indexer,
     String.to_integer(System.get_env("TOKEN_METADATA_UPDATE_INTERVAL") || "#{2 * 24 * 60 * 60}"),
   # bytes
   memory_limit: 1 <<< 30,
-  first_block: System.get_env("FIRST_BLOCK") || "0"
+  first_block: System.get_env("FIRST_BLOCK") || "0",
+  last_block: System.get_env("LAST_BLOCK") || ""
 
 # config :indexer, Indexer.Fetcher.ReplacedTransaction.Supervisor, disabled?: true
 # config :indexer, Indexer.Fetcher.BlockReward.Supervisor, disabled?: true
diff --git a/apps/indexer/lib/indexer/block/catchup/fetcher.ex b/apps/indexer/lib/indexer/block/catchup/fetcher.ex
index bb15ebcd2d..59088ebc3f 100644
--- a/apps/indexer/lib/indexer/block/catchup/fetcher.ex
+++ b/apps/indexer/lib/indexer/block/catchup/fetcher.ex
@@ -72,7 +72,14 @@ defmodule Indexer.Block.Catchup.Fetcher do
       ) do
     Logger.metadata(fetcher: :block_catchup)
 
-    {:ok, latest_block_number} = EthereumJSONRPC.fetch_block_number_by_tag("latest", json_rpc_named_arguments)
+    {:ok, latest_block_number} =
+      case latest_block() do
+        nil ->
+          EthereumJSONRPC.fetch_block_number_by_tag("latest", json_rpc_named_arguments)
+
+        number ->
+          {:ok, number}
+      end
 
     case latest_block_number do
       # let realtime indexer get the genesis block
@@ -337,4 +344,13 @@ defmodule Indexer.Block.Catchup.Fetcher do
       _ -> 0
     end
   end
+
+  defp latest_block do
+    string_value = Application.get_env(:indexer, :last_block)
+
+    case Integer.parse(string_value) do
+      {integer, ""} -> integer
+      _ -> nil
+    end
+  end
 end
diff --git a/docker/Dockerfile b/docker/Dockerfile
index f73c4b34f0..97580300c1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM bitwalker/alpine-elixir-phoenix:1.9.0
+FROM bitwalker/alpine-elixir-phoenix:1.9.1
 
 RUN apk --no-cache --update add alpine-sdk gmp-dev automake libtool inotify-tools autoconf python
 
diff --git a/docs/env-variables.md b/docs/env-variables.md
index d6dd56d7af..edb437ce2f 100644
--- a/docs/env-variables.md
+++ b/docs/env-variables.md
@@ -48,6 +48,7 @@ $ export NETWORK=POA
 | `BLOCK_TRANSFORMER` | | Transformer for blocks: base or clique. | base |  v1.3.4+ |
 | `GRAPHIQL _TRANSACTION` | | Default transaction in query to GraphiQL. | (empty) |  v1.3.4+ |
 | `FIRST_BLOCK` | | The block number, where indexing begins from. | 0 |  v1.3.8+ |
+| `LAST_BLOCK` | | The block number, where indexing stops. | (empty) | master |
 | `TXS_COUNT_CACHE_PERIOD` | | Interval in seconds to restart the task, which calculates the total txs count. | 60 * 60 * 2 |  v1.3.9+ |
 | `ADDRESS_WITH_BALANCES` <br /> `_UPDATE_INTERVAL`|  | Interval in seconds to restart the task, which calculates addresses with balances. | 30 * 60 |  v1.3.9+ |
 | `LINK_TO_OTHER_EXPLORERS` | | true/false. If true, links to other explorers are added in the footer  | (empty)  |  v1.3.0+ |
diff --git a/mix.exs b/mix.exs
index c6c74689f9..af903bbdb0 100644
--- a/mix.exs
+++ b/mix.exs
@@ -14,7 +14,7 @@ defmodule BlockScout.Mixfile do
         plt_add_apps: ~w(ex_unit mix)a,
         ignore_warnings: ".dialyzer-ignore"
       ],
-      elixir: "~> 1.9",
+      elixir: "~> 1.9.1",
       preferred_cli_env: [
         coveralls: :test,
         "coveralls.detail": :test,