diff --git a/docker/mainnet/start-local-mainnet.sh b/docker/mainnet/start-local-mainnet.sh
index d6b691b..b68cfb7 100755
--- a/docker/mainnet/start-local-mainnet.sh
+++ b/docker/mainnet/start-local-mainnet.sh
@@ -17,7 +17,11 @@ export BLOCKBOOK_URL=https://172.17.0.1:9131/
 # Allow node.js to make network calls to https using self-signed certificate.
 export NODE_TLS_REJECT_UNAUTHORIZED=0
 
-# Redis DB
+# Mainnet Fulcrum / ElectrumX
+export FULCRUM_URL=172.17.0.1
+export FULCRUM_PORT=50002
+
+# Redis DB - Used for rate limiting
 export REDIS_PORT=6379
 export REDIS_HOST=172.17.0.1
 
diff --git a/docker/testnet/start-local-testnet.sh b/docker/testnet/start-local-testnet.sh
index 2d969d6..14fcacc 100755
--- a/docker/testnet/start-local-testnet.sh
+++ b/docker/testnet/start-local-testnet.sh
@@ -14,6 +14,10 @@ export BLOCKBOOK_URL=https://172.17.0.1:19131/
 # Allow node.js to make network calls to https using self-signed certificate.
 export NODE_TLS_REJECT_UNAUTHORIZED=0
 
+# Mainnet Fulcrum / ElectrumX
+export FULCRUM_URL=172.17.0.1
+export FULCRUM_PORT=50002
+
 # Redis DB
 export REDIS_PORT=6380
 export REDIS_HOST=172.17.0.1