diff --git a/CHECKSUM_SHA512 b/CHECKSUM_SHA512
new file mode 100644
index 0000000..601bf4f
--- /dev/null
+++ b/CHECKSUM_SHA512
@@ -0,0 +1 @@
+5f756da4d2df59c69997925c69f651011def07bfbdbc582f492ecc19386eee7d79b9951732a792e6041da902d776052d6590cbd2d7004bc93c8406bcf9093fe6
diff --git a/Dockerfile b/Dockerfile
index d3fd618..ba82147 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,9 @@ FROM python:3.9.12-alpine
 ARG BUILD_DATE
 ARG VCS_REF
 ARG VERSION
+ARG CHECKSUM_SHA512
 LABEL maintainer="osintsev@gmail.com" \
-	org.label-schema.vendor="Distirbuted Solutions, Inc." \
+	org.label-schema.vendor="Boroda Group" \
 	org.label-schema.build-date=$BUILD_DATE \
 	org.label-schema.name="Electrum wallet (RPC enabled)" \
 	org.label-schema.description="Electrum wallet with JSON-RPC enabled (daemon mode)" \
@@ -21,16 +22,31 @@ ENV ELECTRUM_VERSION $VERSION
 ENV ELECTRUM_USER electrum
 ENV ELECTRUM_PASSWORD electrumz		# XXX: CHANGE REQUIRED!
 ENV ELECTRUM_HOME /home/$ELECTRUM_USER
-
-RUN apk --update-cache add --virtual build-dependencies gcc musl-dev  && \
-	apk add libsecp256k1 && \
-	adduser -D $ELECTRUM_USER && \
-	pip3 install pycryptodomex https://download.electrum.org/${ELECTRUM_VERSION}/Electrum-${ELECTRUM_VERSION}.tar.gz && \
-	apk del build-dependencies
+ENV ELECTRUM_NETWORK mainnet
 
 RUN mkdir -p /data ${ELECTRUM_HOME} && \
 	ln -sf /data ${ELECTRUM_HOME}/.electrum && \
 	chown ${ELECTRUM_USER} ${ELECTRUM_HOME}/.electrum /data
+=======
+# IMPORTANT: always verify gpg signature before changing a hash here!
+ENV ELECTRUM_CHECKSUM_SHA512 $CHECKSUM_SHA512
+
+RUN adduser -D $ELECTRUM_USER && \
+    apk --no-cache add --virtual build-dependencies gcc musl-dev libsecp256k1 && \
+    wget https://download.electrum.org/${ELECTRUM_VERSION}/Electrum-${ELECTRUM_VERSION}.tar.gz && \
+    [ "${ELECTRUM_CHECKSUM_SHA512}  Electrum-${ELECTRUM_VERSION}.tar.gz" = "$(sha512sum Electrum-${ELECTRUM_VERSION}.tar.gz)" ] && \
+    echo -e "**************************\n SHA 512 Checksum OK\n**************************" && \
+    pip3 install pycryptodomex Electrum-${ELECTRUM_VERSION}.tar.gz && \
+    rm -f Electrum-${ELECTRUM_VERSION}.tar.gz && \
+    apk del build-dependencies
+
+RUN mkdir -p /data \
+	    ${ELECTRUM_HOME}/.electrum/wallets/ \
+	    ${ELECTRUM_HOME}/.electrum/testnet/wallets/ \
+	    ${ELECTRUM_HOME}/.electrum/regtest/wallets/ \
+	    ${ELECTRUM_HOME}/.electrum/simnet/wallets/ && \
+    ln -sf ${ELECTRUM_HOME}/.electrum/ /data && \
+	  chown -R ${ELECTRUM_USER} ${ELECTRUM_HOME}/.electrum /data
 
 USER $ELECTRUM_USER
 WORKDIR $ELECTRUM_HOME
diff --git a/Makefile b/Makefile
index 5f992ed..4c138a1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 ELECTRUM_VERSION = $(strip $(shell cat VERSION))
+ELECTRUM_CHECKSUM_SHA512 = $(strip $(shell cat CHECKSUM_SHA512))
 GIT_COMMIT = $(strip $(shell git rev-parse --short HEAD))
 
 DOCKER_IMAGE ?= osminogin/electrum-daemon
@@ -16,6 +17,7 @@ docker_build:
 	@docker build \
 		--build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
 		--build-arg VERSION=$(ELECTRUM_VERSION) \
+		--build-arg CHECKSUM_SHA512=$(ELECTRUM_CHECKSUM_SHA512) \
 		--build-arg VCS_REF=$(GIT_COMMIT) \
 		-t $(DOCKER_IMAGE):$(DOCKER_TAG) .
 
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 35ffbc2..ae94804 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -1,11 +1,16 @@
 #!/usr/bin/env sh
 set -ex
 
-# Testnet support
-if [ "$TESTNET" = true ]; then
+# Network switch
+if [ "$TESTNET" = true ] || [ "$ELECTRUM_NETWORK" = "testnet" ]; then
   FLAGS='--testnet'
+elif [ "$ELECTRUM_NETWORK" = "regtest" ]; then
+  FLAGS='--regtest'
+elif [ "$ELECTRUM_NETWORK" = "simnet" ]; then
+  FLAGS='--simnet'
 fi
 
+
 # Graceful shutdown
 trap 'pkill -TERM -P1; electrum daemon stop; exit 0' SIGTERM