diff --git a/README.md b/README.md
index 5ee9ce2..448e979 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ eos-bios --launch-data ./launch.yaml                 \
          --keybase-key ./file.key                    \
          --bp-api-address http://1.2.3.4:8888        \
          --bp-p2p-address 1.2.3.4:9876               \
-         --eosio-system-code ./eosio-system.wast     \
+         --eosio-system-code ./eosio-system.wasm     \
          --eosio-system-abi ./eosio-system.abi       \
          --opening-balances-snapshot ./snapshot.csv
 ```
diff --git a/main.go b/main.go
index 9a83617..7df35fc 100644
--- a/main.go
+++ b/main.go
@@ -12,7 +12,7 @@ import (
 var producerAPIAddress = flag.String("bp-api-address", "", "Target API endpoint for the locally booting node, a clean-slate node. It can be routable only from the local machine.")
 var producerP2PAddress = flag.String("bp-p2p-address", "", "Endpoint which will be published at the end of the process. Needs to be externally routable.")
 var eosioMyAccount = flag.String("eosio-my-account", "", "Endpoint which will be published at the end of the process. Needs to be externally routable.")
-var eosioSystemCodePath = flag.String("eosio-system-code", "./eosio-system.wast", "Path to a compiled eosio.system contract .wast file")
+var eosioSystemCodePath = flag.String("eosio-system-code", "./eosio-system.wasm", "Path to a compiled eosio.system contract .wasm file")
 var eosioSystemABIPath = flag.String("eosio-system-abi", "./eosio-system.abi", "Path to an eosio.system .abi file")
 var openingBalancesSnapshotPath = flag.String("opening-balances-snapshot", "./snapshot.csv", "Path to a fresh snapshot of the ERC-20 Crowdsale token")
 var keybaseKeyPath = flag.String("keybase-key", "", "Path to a PGP key, or keybase thing.. TBD")