diff --git a/INTEROP.md b/INTEROP.md
index 3167fb24a..b6915ef62 100644
--- a/INTEROP.md
+++ b/INTEROP.md
@@ -47,7 +47,7 @@ Open up two terminal windows, run:
 bazel run //beacon-chain -- \
 --no-genesis-delay \
 --bootstrap-node= \
---deposit-contract 0xD775140349E6A5D12524C6ccc3d6A1d4519D4029 \
+--deposit-contract $(curl https://prylabs.net/contract) \
 --clear-db \
 --interop-num-validators 64 \
 --interop-eth1data-votes
@@ -72,7 +72,7 @@ Assuming you generated a `genesis.ssz` file with 64 validators, open up two term
  bazel run //beacon-chain -- \
 --no-genesis-delay \
 --bootstrap-node= \
---deposit-contract 0xD775140349E6A5D12524C6ccc3d6A1d4519D4029 \
+--deposit-contract $(curl https://prylabs.net/contract) \
 --clear-db \
 --interop-genesis-state /path/to/genesis.ssz \
 --interop-eth1data-votes
diff --git a/README.md b/README.md
index 617cfed60..f346a6cb3 100644
--- a/README.md
+++ b/README.md
@@ -212,7 +212,7 @@ The example below will deterministically generate a beacon genesis state, initia
 bazel run //beacon-chain -- \
 --no-genesis-delay \
 --bootstrap-node= \
---deposit-contract 0xD775140349E6A5D12524C6ccc3d6A1d4519D4029 \
+--deposit-contract $(curl https://prylabs.net/contract) \
 --clear-db \
 --interop-num-validators 64 \
 --interop-eth1data-votes