diff --git a/.env.sample b/.env.sample
index ee2dfd5..1ab318d 100644
--- a/.env.sample
+++ b/.env.sample
@@ -60,6 +60,9 @@ BLOCK_PROPOSAL_FEE=1
 # Comma-delineated list of prover endpoints proposer should query when attempting to propose a block
 # If you keep this default value you must also enable a prover by setting ENABLE_PROVER=true
 PROVER_ENDPOINTS=http://taiko_client_prover_relayer:9876
+# Whether to prove unassigned blocks or not (blocks that have expired their proof window
+# without the original prover submitting a proof.)
+PROVE_UNASSIGNED_BLOCKS=false
 
 # Comma-delimited local tx pool addresses you want to prioritize, useful to set your proposer to only propose blocks with your prover's transactions
 TXPOOL_LOCALS=
diff --git a/script/start-prover-relayer.sh b/script/start-prover-relayer.sh
index 1fe38f2..401f84b 100755
--- a/script/start-prover-relayer.sh
+++ b/script/start-prover-relayer.sh
@@ -16,6 +16,7 @@ if [ "$ENABLE_PROVER" == "true" ]; then
         --l2.http http://l2_execution_engine:8545
         --taikoL1 ${TAIKO_L1_ADDRESS}
         --taikoL2 ${TAIKO_L2_ADDRESS}
+        --taikoToken ${TAIKO_TOKEN_L1_ADDRESS}
         --zkevmRpcdEndpoint http://zkevm_chain_prover_rpcd:9000
         --zkevmRpcdParamsPath /data
         --l1.proverPrivKey ${L1_PROVER_PRIVATE_KEY}
@@ -27,6 +28,10 @@ if [ "$ENABLE_PROVER" == "true" ]; then
         ARGS="${ARGS} --prover.proveBlockTxGasLimit ${PROVE_BLOCK_TX_GAS_LIMIT}"
     fi
 
+    if [[ ! -z "$PROVE_UNASSIGNED_BLOCKS" ]]; then
+        ARGS="${ARGS} --prover.proveUnassignedBlocks"
+    fi
+
     taiko-client prover ${ARGS}
 else
     sleep infinity