diff --git a/chains/chainMonitor.js b/chains/chainMonitor.js
index ce9d384..8bc6b3b 100644
--- a/chains/chainMonitor.js
+++ b/chains/chainMonitor.js
@@ -130,7 +130,8 @@ function ChainMonitor() {
       const currentBlock = await got.get(`${restUrl}cosmos/base/tendermint/v1beta1/blocks/latest`, gotOpts).json()
       const currentBlockTime = new Date(currentBlock.block.header.time) / 1000
       const currentBlockHeight = currentBlock.block.header.height
-      const prevBlock = await got.get(`${restUrl}cosmos/base/tendermint/v1beta1/blocks/${currentBlockHeight - 100}`, gotOpts).json()
+      const blocksToCompare = process.env.BLOCKS_TO_COMPARE || Math.min(1000, currentBlockHeight - 1)
+      const prevBlock = await got.get(`${restUrl}cosmos/base/tendermint/v1beta1/blocks/${currentBlockHeight - blocksToCompare}`, gotOpts).json()
       const prevBlockTime = new Date(prevBlock.block.header.time) / 1000
       const prevBlockHeight = prevBlock.block.header.height
       const actualBlockTime = (currentBlockTime - prevBlockTime) / (currentBlockHeight - prevBlockHeight)