diff --git a/Makefile b/Makefile
index a5a2879d6..739396aba 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ clean:
 compile: clean
 	@# Note: using /bin/echo for macOS
 	@git submodule update --recursive --init
-	@solc --metadata-literal --bin --abi --combined-json=abi,bin,bin-runtime,srcmap,srcmap-runtime,ast,metadata,storage-layout --overwrite -o . deposit_contract.sol tests/deposit_contract.t.sol
+	@solc --metadata-literal --optimize --optimize-runs 5000000 --bin --abi --combined-json=abi,bin,bin-runtime,srcmap,srcmap-runtime,ast,metadata,storage-layout --overwrite -o . deposit_contract.sol tests/deposit_contract.t.sol
 	@/bin/echo -n '{"abi": ' > deposit_contract.json
 	@cat DepositContract.abi >> deposit_contract.json
 	@/bin/echo -n ', "bytecode": "0x' >> deposit_contract.json