diff --git a/Dockerfile b/Dockerfile
index 9b3df18..747c4e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,16 +1,16 @@
 FROM debian:buster-slim as builder
 
-ARG BITCOIN_VERSION=${BITCOIN_VERSION:-24.0.1}
+ARG BITCOIN_VERSION="2a599a3cb645"
 ARG TRIPLET=${TRIPLET:-"x86_64-linux-gnu"}
 
+COPY bitcoin-${BITCOIN_VERSION}-${TRIPLET}.tar.gz /tmp/bitcoin-${BITCOIN_VERSION}-${TRIPLET}.tar.gz
+
 RUN  apt-get update && \
      apt-get install -qq --no-install-recommends ca-certificates dirmngr gosu wget libc6 procps python3
 WORKDIR /tmp
 
 # install bitcoin binaries
-RUN BITCOIN_URL="https://bitcoincore.org/bin/bitcoin-core-${BITCOIN_VERSION}/bitcoin-${BITCOIN_VERSION}-${TRIPLET}.tar.gz" && \
-     BITCOIN_FILE="bitcoin-${BITCOIN_VERSION}-${TRIPLET}.tar.gz" && \
-     wget -qO "${BITCOIN_FILE}" "${BITCOIN_URL}" && \
+RUN BITCOIN_FILE="bitcoin-${BITCOIN_VERSION}-${TRIPLET}.tar.gz" && \
      mkdir -p bin && \
      tar -xzvf "${BITCOIN_FILE}" -C /tmp/bin --strip-components=2 "bitcoin-${BITCOIN_VERSION}/bin/bitcoin-cli" "bitcoin-${BITCOIN_VERSION}/bin/bitcoind" "bitcoin-${BITCOIN_VERSION}/bin/bitcoin-wallet" "bitcoin-${BITCOIN_VERSION}/bin/bitcoin-util"
 FROM debian:buster-slim as custom-signet-bitcoin
diff --git a/bitcoin-2a599a3cb645-x86_64-linux-gnu.tar.gz b/bitcoin-2a599a3cb645-x86_64-linux-gnu.tar.gz
new file mode 100644
index 0000000..079e7f5
Binary files /dev/null and b/bitcoin-2a599a3cb645-x86_64-linux-gnu.tar.gz differ
diff --git a/gen-bitcoind-conf.sh b/gen-bitcoind-conf.sh
index 3c6de46..728762d 100755
--- a/gen-bitcoind-conf.sh
+++ b/gen-bitcoind-conf.sh
@@ -32,6 +32,7 @@ daemon=1
 listen=1
 server=1
 discover=1
+signetblocktime=$BLOCKPRODUCTIONDELAY
 signetchallenge=$SIGNETCHALLENGE
 zmqpubrawblock=$ZMQPUBRAWBLOCK
 zmqpubrawtx=$ZMQPUBRAWTX