diff --git a/config/fixturenet-optimism/optimism-contracts/deploy-contracts.sh b/config/fixturenet-optimism/optimism-contracts/deploy-contracts.sh
index 23a2bc3..d31dc22 100755
--- a/config/fixturenet-optimism/optimism-contracts/deploy-contracts.sh
+++ b/config/fixturenet-optimism/optimism-contracts/deploy-contracts.sh
@@ -65,7 +65,7 @@ if [ -n "$CERC_L1_ADDRESS" ] && [ -n "$CERC_L1_PRIV_KEY" ]; then
   # Sequencer
   SEQ=$(echo "$wallet3" | awk '/Address:/{print $2}')
   SEQ_KEY=$(echo "$wallet3" | awk '/Private key:/{print $3}')
-  
+
   echo "Funding accounts."
   wait_for_block 1 300
   cast send --from $ADMIN --rpc-url $CERC_L1_RPC --value 5ether $PROPOSER --private-key $ADMIN_KEY
@@ -105,42 +105,26 @@ echo "$accounts_json" > "/l2-accounts/accounts.json"
 echo "Checking L1 for finalized block..."
 finalized=$(cast block finalized --rpc-url $CERC_L1_RPC | grep -E "(timestamp|hash|number)" || true)
 
-if [ -n "$finalized" ]; then
-  # finalized block was found
-  start_block=$finalized
-else
+config_build_script="scripts/getting-started/config.sh"
+if [ -z "$finalized" ]; then
   # assume fresh chain and use block 1 instead
   echo "No finalized block. Using block 1 instead."
   # wait for 20 or so blocks to be safe
   wait_for_block 24 300
-  start_block=$(cast block 1 --rpc-url $CERC_L1_RPC | grep -E "(timestamp|hash|number)" || true)
+
+  # Replace how block is calculated in the config building script
+  sed -i 's/block=.*/block=$(cast block 1 --rpc-url $L1_RPC_URL)/g' $config_build_script
 fi
 
-if [ -z "$start_block" ]; then
-  echo "Unable to query chain for starting block. Exiting..."
-  exit 1
-fi
+# Generate the deploy-config/getting-started.json file
+GS_ADMIN_ADDRESS=$ADMIN GS_BATCHER_ADDRESS=$BATCHER GS_PROPOSER_ADDRESS=$PROPOSER GS_SEQUENCER_ADDRESS=$SEQ L1_RPC_URL=$CERC_L1_RPC $config_build_script
 
-BLOCKHASH=$(echo $start_block | awk -F ' ' '{print $2}')
-HEIGHT=$(echo $start_block | awk -F ' ' '{print $4}')
-TIMESTAMP=$(echo $start_block | awk -F ' ' '{print $6}')
-
-echo "Using block as deployment point:"
-echo "Height: $HEIGHT"
-echo "Hash: $BLOCKHASH"
-echo "Timestamp: $TIMESTAMP"
-
-# Fill out the deployment template (./deploy-config/getting-started.json) with our values:
 echo "Writing deployment config."
 deploy_config_file="deploy-config/$DEPLOYMENT_CONTEXT.json"
 cp deploy-config/getting-started.json $deploy_config_file
+
+# Replace chain id in the copied config
 sed -i "s/\"l1ChainID\": .*/\"l1ChainID\": $DEPLOYMENT_CONTEXT,/g" $deploy_config_file
-sed -i "s/ADMIN/$ADMIN/g" $deploy_config_file
-sed -i "s/PROPOSER/$PROPOSER/g" $deploy_config_file
-sed -i "s/BATCHER/$BATCHER/g" $deploy_config_file
-sed -i "s/SEQUENCER/$SEQ/g" $deploy_config_file
-sed -i "s/BLOCKHASH/$BLOCKHASH/g" $deploy_config_file
-sed -i "s/TIMESTAMP/$TIMESTAMP/g" $deploy_config_file
 
 mkdir -p deployments/$DEPLOYMENT_CONTEXT
 
diff --git a/stack/fixturenet-optimism/stack.yml b/stack/fixturenet-optimism/stack.yml
index 56c54bf..3ea9217 100644
--- a/stack/fixturenet-optimism/stack.yml
+++ b/stack/fixturenet-optimism/stack.yml
@@ -8,8 +8,8 @@ repos:
   - git.vdb.to/cerc-io/lighthouse
   # L2 (optimism)
   - github.com/dboreham/foundry
-  - github.com/ethereum-optimism/optimism@op-node/v1.3.0
-  - github.com/ethereum-optimism/op-geth@v1.101304.0
+  - github.com/ethereum-optimism/optimism@v1.7.3
+  - github.com/ethereum-optimism/op-geth@v1.101311.0
 containers:
   # L1 (fixturenet-plugeth)
   - cerc/plugeth-statediff