diff --git a/lib/blockchain/bitcoin.js b/lib/blockchain/bitcoin.js
index 88e38988..c8a3d8b8 100644
--- a/lib/blockchain/bitcoin.js
+++ b/lib/blockchain/bitcoin.js
@@ -4,7 +4,7 @@ const { utils: coinUtils } = require('lamassu-coins')
 
 const common = require('./common')
 
-module.exports = {setup}
+module.exports = { setup, updateCore }
 
 const coinRec = coinUtils.getCryptoCurrency('BTC')
 
@@ -16,6 +16,23 @@ function setup (dataDir) {
   common.writeSupervisorConfig(coinRec, cmd)
 }
 
+function updateCore (coinRec) {
+  common.logger.info('Updating Bitcoin Core. This may take a minute.')
+  common.es(`supervisorctl stop bitcoin`)
+  common.es(`curl -#o /tmp/bitcoin.tar.gz ${coinRec.url}`)
+  common.es(`tar -xzf /tmp/bitcoin.tar.gz -C /tmp/`)
+
+  common.logger.info('Updating wallet...')
+  common.es(`cp /tmp/${coinRec.dir}/* /usr/local/bin/`)
+  common.es(`rm -r /tmp/${coinRec.dir.replace('/bin', '')}`)
+  common.es(`rm /tmp/bitcoin.tar.gz`)
+
+  common.logger.info('Starting wallet...')
+  common.es(`supervisorctl start bitcoin`)
+
+  common.logger.info('Bitcoin Core is updated!')
+}
+
 function buildConfig () {
   return `rpcuser=lamassuserver
 rpcpassword=${common.randomPass()}
diff --git a/lib/blockchain/common.js b/lib/blockchain/common.js
index 2c0bdc3c..53cc6262 100644
--- a/lib/blockchain/common.js
+++ b/lib/blockchain/common.js
@@ -3,6 +3,7 @@ const os = require('os')
 const path = require('path')
 const cp = require('child_process')
 const fs = require('fs')
+const btc = require('./bitcoin')
 
 const _ = require('lodash/fp')
 
@@ -16,13 +17,17 @@ module.exports = {
   fetchAndInstall,
   logger,
   isInstalledSoftware,
-  writeFile
+  writeFile,
+  getBinaries,
+  isUpdateDependent
 }
 
 const BINARIES = {
   BTC: {
-    url: 'https://bitcoincore.org/bin/bitcoin-core-0.20.1/bitcoin-0.20.1-x86_64-linux-gnu.tar.gz',
-    dir: 'bitcoin-0.20.1/bin'
+    defaultUrl: 'https://bitcoincore.org/bin/bitcoin-core-0.20.0/bitcoin-0.20.0-x86_64-linux-gnu.tar.gz',
+    defaultDir: 'bitcoin-0.20.0/bin',
+    url: 'https://bitcoincore.org/bin/bitcoin-core-0.21.0/bitcoin-0.21.0-x86_64-linux-gnu.tar.gz',
+    dir: 'bitcoin-0.21.0/bin'
   },
   ETH: {
     url: 'https://gethstore.blob.core.windows.net/builds/geth-linux-amd64-1.9.25-e7872729.tar.gz',
@@ -47,6 +52,8 @@ const BINARIES = {
   }
 }
 
+const coinsUpdateDependent = ['BTC']
+
 function firewall (ports) {
   if (!ports || ports.length === 0) throw new Error('No ports supplied')
   const portsString = ports.join(',')
@@ -87,14 +94,15 @@ function isInstalledSoftware (coinRec) {
 }
 
 function fetchAndInstall (coinRec) {
+  const requiresUpdate = isUpdateDependent(coinRec.code)
   if (isInstalledSoftware(coinRec)) return
 
   const binaries = BINARIES[coinRec.cryptoCode]
   if (!binaries) throw new Error(`No such coin: ${coinRec.code}`)
 
-  const url = binaries.url
+  const url = requiresUpdate ? binaries.defaultUrl : binaries.url
   const downloadFile = path.basename(url)
-  const binDir = binaries.dir
+  const binDir = requiresUpdate ? binaries.defaultDir : binaries.dir
 
   es(`wget -q ${url}`)
   es(`tar -xzf ${downloadFile}`)
@@ -121,3 +129,13 @@ function writeFile (path, content) {
     throw err
   }
 }
+
+function getBinaries (coinCode) {
+  const binaries = BINARIES[coinCode]
+  if (!binaries) throw new Error(`No such coin: ${coinCode}`)
+  return binaries
+}
+
+function isUpdateDependent (coinCode) {
+  return _.includes(coinCode, coinsUpdateDependent)
+}
diff --git a/lib/blockchain/install.js b/lib/blockchain/install.js
index 8a71a826..3a8df46b 100644
--- a/lib/blockchain/install.js
+++ b/lib/blockchain/install.js
@@ -69,6 +69,8 @@ function processCryptos (codes) {
   ) | crontab -`
   common.es(rsyncCmd)
 
+  _.forEach(updateCrypto, selectedCryptos)
+
   logger.info('Installation complete.')
 }
 
@@ -91,6 +93,12 @@ function setupCrypto (crypto) {
   process.chdir(oldDir)
 }
 
+function updateCrypto (crypto) {
+  if (!common.isUpdateDependent(crypto)) return
+  const cryptoPlugin = plugin(crypto)
+  cryptoPlugin.updateCore(common.getBinaries(crypto))
+}
+
 function plugin (crypto) {
   const plugin = PLUGINS[crypto.cryptoCode]
   if (!plugin) throw new Error(`No such plugin: ${crypto.cryptoCode}`)