diff --git a/.dockerignore b/.dockerignore
index 8a5a20c6..862cda4c 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -11,9 +11,10 @@ prerender-server/node_modules
 data_bitcoin_mainnet
 data_liquid_mainnet
 data_bitcoin_testnet
+data_bitcoin_testnet4
 data_bitcoin_regtest
 data_liquid_regtest
 www/libwally
 data_liquid_testnet
 data_bitcoin_signet
-gitlab/
\ No newline at end of file
+gitlab/
diff --git a/README.md b/README.md
index f811543b..abbba2de 100644
--- a/README.md
+++ b/README.md
@@ -173,6 +173,15 @@ docker run -p 50001:50001 -p 8084:80 \
            bash -c "/srv/explorer/run.sh bitcoin-testnet explorer"
 ```
 
+## How to run the explorer for Bitcoin testnet4
+
+```
+docker run -p 50001:50001 -p 8084:80 \
+           --volume $PWD/data_bitcoin_testnet4:/data \
+           --rm -i -t esplora \
+           bash -c "/srv/explorer/run.sh bitcoin-testnet4 explorer"
+```
+
 ## How to run the explorer for Bitcoin signet
 
 ```bash
diff --git a/contrib/Dockerfile b/contrib/Dockerfile
index 6f7b63a0..87eb3de3 100644
--- a/contrib/Dockerfile
+++ b/contrib/Dockerfile
@@ -26,6 +26,8 @@ RUN source /root/.nvm/nvm.sh \
     npm run dist -- bitcoin-mainnet \
  && DEST=/srv/explorer/static/bitcoin-testnet \
     npm run dist -- bitcoin-testnet \
+ && DEST=/srv/explorer/static/bitcoin-testnet4 \
+    npm run dist -- bitcoin-testnet4 \
  && DEST=/srv/explorer/static/bitcoin-signet \
     npm run dist -- bitcoin-signet \
  && DEST=/srv/explorer/static/bitcoin-regtest \
@@ -40,6 +42,8 @@ RUN source /root/.nvm/nvm.sh \
     npm run dist -- bitcoin-mainnet blockstream \
  && DEST=/srv/explorer/static/bitcoin-testnet-blockstream \
     npm run dist -- bitcoin-testnet blockstream \
+ && DEST=/srv/explorer/static/bitcoin-testnet4-blockstream \
+    npm run dist -- bitcoin-testnet4 blockstream \
  && DEST=/srv/explorer/static/bitcoin-signet-blockstream \
     npm run dist -- bitcoin-signet blockstream \
  && DEST=/srv/explorer/static/bitcoin-regtest-blockstream \
diff --git a/contrib/Dockerfile.base b/contrib/Dockerfile.base
index 2a185dbb..65c47208 100644
--- a/contrib/Dockerfile.base
+++ b/contrib/Dockerfile.base
@@ -31,10 +31,10 @@ RUN git clone --quiet --depth 1 --single-branch --branch v0.40.1 https://github.
 ARG TARGETARCH
 ENV SHA256SUM_ELEMENTS_X86_64="86e3061a6cb82ea979954d7b187442b6a104648c26bda2ddf297e513b5d53c51"
 ENV SHA256SUM_ELEMENTS_ARM64="e44566fad37cb632fa7b4d288e6e20fb3af26745a20950da8c55997ad427e05c"
-ENV SHA256SUM_BITCOINCORE_X86_64="acc223af46c178064c132b235392476f66d486453ddbd6bca6f1f8411547da78"
-ENV SHA256SUM_BITCOINCORE_ARM64="154c9b9e6e17136edc8f20fda5d252fb339e727e4a85ef49e7d8facb9085f2d3"
+ENV SHA256SUM_BITCOINCORE_X86_64="98add5f220c01b387343b70edeb6273403fe081e22cd85fda132704cdcaa98aa"
+ENV SHA256SUM_BITCOINCORE_ARM64="10581b6d4aeb091c08c9e69eb4e4ced000038c009286dc1edb8a876656ccf6df"
 
-ENV VERSION_BITCOINCORE=27.2
+ENV VERSION_BITCOINCORE=28.2
 RUN if [ "${TARGETARCH}" = "arm64" ]; then \
    curl -sL -o bitcoin.tar.gz "https://bitcoincore.org/bin/bitcoin-core-${VERSION_BITCOINCORE}/bitcoin-${VERSION_BITCOINCORE}-aarch64-linux-gnu.tar.gz"; \
    echo "${SHA256SUM_BITCOINCORE_ARM64}  bitcoin.tar.gz" | sha256sum --check; \
@@ -65,7 +65,7 @@ RUN source /root/.cargo/env \
  && mkdir -p /srv/explorer/electrs{,_liquid} \
  && git clone --no-checkout https://github.com/blockstream/electrs.git \
  && (cd electrs \
- && git checkout 306f66acf2ab10bcd99b8012e95a0de30b2cc012 \
+ && git checkout fee74a0450bc28f50f89d8115c8434844088d469 \
  && cp contrib/popular-scripts.txt /srv/explorer \
  && cargo install --root /srv/explorer/electrs_bitcoin --locked --path . --features electrum-discovery \
  && cargo install --root /srv/explorer/electrs_liquid --locked --path . --features electrum-discovery,liquid \
diff --git a/contrib/bitcoin-testnet4-explorer.conf.in b/contrib/bitcoin-testnet4-explorer.conf.in
new file mode 100644
index 00000000..0da574e0
--- /dev/null
+++ b/contrib/bitcoin-testnet4-explorer.conf.in
@@ -0,0 +1,11 @@
+testnet4=1
+[testnet4]
+server=1
+peerbloomfilters=0
+enforcenodebloom=1
+disablewallet=1
+listenonion=1
+listen=1
+mempoolfullrbf=1
+blocknotify=pkill -USR1 electrs
+maxmempool=1000
diff --git a/flavors/bitcoin-testnet4/config.env b/flavors/bitcoin-testnet4/config.env
new file mode 100755
index 00000000..46105212
--- /dev/null
+++ b/flavors/bitcoin-testnet4/config.env
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+export SITE_TITLE='Bitcoin Testnet4 Explorer'
+export HOME_TITLE='Bitcoin Testnet4 Explorer'
+export NATIVE_ASSET_LABEL=tBTC
+export NATIVE_ASSET_NAME='Bitcoin Testnet4'
+
+export MENU_ACTIVE='Bitcoin Testnet4'
+export BASE_HREF=${BASE_HREF:-'/testnet4/'}
+
+export CUSTOM_ASSETS="$CUSTOM_ASSETS flavors/bitcoin-testnet4/www/*"
+export CUSTOM_CSS="$CUSTOM_CSS flavors/bitcoin-testnet4/extras.css"
diff --git a/flavors/bitcoin-testnet4/extras.css b/flavors/bitcoin-testnet4/extras.css
new file mode 100644
index 00000000..14ab3d3a
--- /dev/null
+++ b/flavors/bitcoin-testnet4/extras.css
@@ -0,0 +1,71 @@
+#BitcoinTestnet, #LiquidTestnet{
+    display: block;
+}
+
+#Bitcoin, #Liquid{
+    display: none;
+}
+  
+.main-nav li.active a{
+    border: 1px solid rgba(168, 184, 201, 1);
+}
+
+.sub-nav .active {
+    border-bottom: solid 2px rgba(168, 184, 201, 1);
+}
+
+.details-btn > div { 
+    color: rgba(168, 184, 201, 1);
+    border: 1px solid rgba(168, 184, 201, 1);
+}
+
+.transaction-box > .footer > div:nth-child(3) {
+    color: rgba(168, 184, 201, 1);
+}
+
+.navbar {
+    background-image: linear-gradient(-90deg, rgba(84, 103, 124, 1) 0%, rgba(29, 72, 111, 1) 18%, rgba(24, 53, 80, 1) 36%, rgba(29, 37, 48, 1) 58%, rgba(14, 16, 17, 1) 100%);
+}
+
+.sub-nav a sup.highlight{
+    display: none;
+}
+
+.main-nav li a{
+    color: #78838e;
+}
+
+.nav-link:hover{
+    color: white !important;
+}
+
+.sub-navbar:before {
+    content: "Bitcoin Testnet4 is used for testing. Funds have no value!";
+    width: 100%;
+    height: 35px;
+    background: #ba042a;
+    position: absolute;
+    margin-top: -10px;
+    text-align: center;
+    font-size: 14px;
+    line-height: 2.4;
+}
+
+.sub-nav-container{
+    margin-top: 25px;
+}
+
+.table-title, .block-header-title, .transaction-header-title{
+    display: flex;
+}
+
+.table-title:after, .block-header-title:after, .transaction-header-title:after {
+    content: "Testnet4";
+    font-size: 13px;
+    background-color: rgb(48 59 70);
+    padding: 3px 12px;
+    border-radius: 30px;
+    margin-left: 15px;
+    display: inline-block;
+    align-self: center;
+}
diff --git a/flavors/bitcoin-testnet4/www/img/block.png b/flavors/bitcoin-testnet4/www/img/block.png
new file mode 100644
index 00000000..34e97f0d
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/block.png differ
diff --git a/flavors/bitcoin-testnet4/www/img/favicon.png b/flavors/bitcoin-testnet4/www/img/favicon.png
new file mode 100644
index 00000000..2a954284
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/favicon.png differ
diff --git a/flavors/bitcoin-testnet4/www/img/icons/menu-logo.svg b/flavors/bitcoin-testnet4/www/img/icons/menu-logo.svg
new file mode 100644
index 00000000..99ae109c
--- /dev/null
+++ b/flavors/bitcoin-testnet4/www/img/icons/menu-logo.svg
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="60px" height="60px" viewBox="0 0 60 60" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>btc_test</title>
+    <g id="btc_test" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g>
+            <polygon id="Path" fill-opacity="0" fill="#D8D8D8" points="0 0 60 0 60 60 0 60"></polygon>
+            <path d="M49.4,34.84 C47.4448559,42.689736 40.9534985,48.5886791 32.9530354,49.7859817 C24.9525722,50.9832842 17.0186852,47.2431389 12.8511751,40.3096835 C8.68366503,33.3762281 9.1033181,24.6149987 13.914438,18.1116096 C18.7255579,11.6082205 26.9806001,8.64350677 34.83,10.6 C45.5464746,13.2711227 52.0692807,24.1230665 49.4,34.84 Z" id="Path" fill="#5D6368" fill-rule="nonzero"></path>
+            <path d="M38.28,26.72 C38.67,24.09 36.73,22.72 34.07,21.72 L34.93,18.16 L32.83,17.62 L32,21.1 L30.32,20.69 L31.16,17.21 L29.06,16.67 L28.2,20.22 L26.86,19.9 L26.86,19.9 L24,19.14 L23.44,21.45 C23.44,21.45 25,21.82 24.97,21.85 C25.5877056,21.9331416 26.0293009,22.4895517 25.97,23.11 L24.97,27.16 L25.18,27.23 L24.96,27.18 L23.59,32.85 C23.5329471,33.0560057 23.3928258,33.229024 23.2031743,33.3276428 C23.0135227,33.4262616 22.7914103,33.4416048 22.59,33.37 C22.59,33.37 21,33 21,33 L20,35.48 L22.74,36.18 L24.24,36.58 L23.36,40.18 L25.47,40.72 L26.33,37.15 L28,37.6 L27.14,41.15 L29.25,41.69 L30.12,38.09 C33.7,38.79 36.4,38.51 37.53,35.17 C38.45,32.48 37.53,30.93 35.6,29.92 C37.1180706,29.5885155 38.2200789,28.2726847 38.28,26.72 Z M33.48,33.66 C32.83,36.35 28.48,34.89 27.01,34.53 L28.16,29.76 C29.59,30.13 34.16,30.85 33.48,33.66 L33.48,33.66 Z M34.13,26.66 C33.54,29.1 29.88,27.86 28.69,27.56 L29.69,23.23 C30.88,23.54 34.69,24.11 34.08,26.66 L34.13,26.66 Z" id="Shape" fill="#FFFFFF" fill-rule="nonzero"></path>
+        </g>
+    </g>
+</svg>
\ No newline at end of file
diff --git a/flavors/bitcoin-testnet4/www/img/icons/minus.png b/flavors/bitcoin-testnet4/www/img/icons/minus.png
new file mode 100644
index 00000000..d8c84942
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/icons/minus.png differ
diff --git a/flavors/bitcoin-testnet4/www/img/icons/plus.png b/flavors/bitcoin-testnet4/www/img/icons/plus.png
new file mode 100644
index 00000000..de3d03b9
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/icons/plus.png differ
diff --git a/flavors/bitcoin-testnet4/www/img/icons/search.png b/flavors/bitcoin-testnet4/www/img/icons/search.png
new file mode 100644
index 00000000..6476e512
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/icons/search.png differ
diff --git a/flavors/bitcoin-testnet4/www/img/transaction.png b/flavors/bitcoin-testnet4/www/img/transaction.png
new file mode 100644
index 00000000..f4a6cb09
Binary files /dev/null and b/flavors/bitcoin-testnet4/www/img/transaction.png differ
diff --git a/run.sh b/run.sh
index cebacfdc..a9fd846d 100755
--- a/run.sh
+++ b/run.sh
@@ -10,7 +10,7 @@ SYNC_SOURCE=$5
 NGINX_GCLB_IP=${NGINX_GCLB_IP:-34.36.36.12} # bs.info
 
 if [ -z "$FLAVOR" ] || [ ! -d /srv/explorer/static/$FLAVOR ]; then
-    echo "Please provide bitcoin-mainnet, bitcoin-testnet, bitcoin-signet, bitcoin-regtest, liquid-mainnet, liquid-testnet or liquid-regtest as a parameter"
+    echo "Please provide bitcoin-mainnet, bitcoin-testnet, bitcoin-testnet4, bitcoin-signet, bitcoin-regtest, liquid-mainnet, liquid-testnet or liquid-regtest as a parameter"
     echo "For example run.sh bitcoin-mainnet explorer"
     exit 1
 fi
@@ -26,7 +26,9 @@ ELECTRS_NETWORK=${NETWORK}
 
 DAEMON_DIR="/data/$DAEMON"
 if [ "$DAEMON-$NETWORK" == "bitcoin-testnet" ]; then
-  DAEMON_DIR="$DAEMON_DIR/testnet3"
+  DAEMON_DIR="$DAEMON_DIR/testnet"
+elif [ "$DAEMON-$NETWORK" == "bitcoin-testnet4" ]; then
+  DAEMON_DIR="$DAEMON_DIR/testnet4"
 elif [ "$DAEMON-$NETWORK" == "bitcoin-signet" ]; then
   DAEMON_DIR="$DAEMON_DIR/signet"
 elif [ "$DAEMON-$NETWORK" == "liquid-mainnet" ]; then
@@ -54,7 +56,7 @@ NGINX_REWRITE_NOJS='return 301 " /nojs$uri"'
 NGINX_CSP="default-src 'self'; script-src 'self' 'unsafe-eval'; img-src 'self' data:; style-src 'self' 'unsafe-inline'; font-src 'self' data:; object-src 'none'"
 
 if [ "${DAEMON}" != "liquid" ]; then
-    if [ "$NETWORK" == "testnet" ] || [ "$NETWORK" == "signet" ] || [ "$NETWORK" == "regtest" ]; then
+    if [ "$NETWORK" == "testnet" ] || [ "$NETWORK" == "testnet4" ] || [ "$NETWORK" == "signet" ] || [ "$NETWORK" == "regtest" ]; then
         NGINX_PATH="$NETWORK/"
         NGINX_NOSLASH_PATH="$NETWORK"
         NGINX_REWRITE='rewrite ^/'$NETWORK'(/.*)$ $1 break;'