diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index 72d9044..30217f3 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -7,12 +7,12 @@ jobs:
     name: deploy
     runs-on: ubuntu-20.04
     env:
-      GAS_LIMIT: 100000000
-      GAS_PRICE: 1000000000
+      HARMONY_GAS_LIMIT: 100000000
+      HARMONY_GAS_PRICE: 1000000000
       # cf. https://github.com/harmony-one/harmony/pull/3332
-      LOCAL_PRIVATE_KEY: '0x1f84c95ac16e6a50f08d44c7bde7aff8742212fda6e4321fde48bf83bef266dc'
-      LOCAL_SHARD_0_URL: http://localhost:9599
-      LOCAL_SHARD_1_URL: http://localhost:9598
+      HARMONY_LOCAL_PRIVATE_KEY: '0x1f84c95ac16e6a50f08d44c7bde7aff8742212fda6e4321fde48bf83bef266dc'
+      HARMONY_LOCAL_SHARD_0_URL: http://localhost:9599
+      HARMONY_LOCAL_SHARD_1_URL: http://localhost:9598
     steps:
       # go is needed for harmony
       - name: Set up Go 1.16
diff --git a/README.md b/README.md
index 0664a0f..e15b912 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,12 @@ harmony-cosmos-bridge-demo
 ## Env
 
 ```
-export LOCAL_SHARD_0_URL=http://localhost:9599
-export LOCAL_SHARD_1_URL=http://localhost:9598
+export HARMONY_LOCAL_SHARD_0_URL=http://localhost:9599
+export HARMONY_LOCAL_SHARD_1_URL=http://localhost:9598
+export HARMONY_GAS_LIMIT=100000000
+export HARMONY_GAS_PRICE=1000000000
+# cf. https://github.com/harmony-one/harmony/pull/3332
+export HARMONY_LOCAL_PRIVATE_KEY: '0x1f84c95ac16e6a50f08d44c7bde7aff8742212fda6e4321fde48bf83bef266dc'
 ```
 
 ## Harmony Localnet
diff --git a/contract/truffle-config.js b/contract/truffle-config.js
index fe8d65f..03495a4 100644
--- a/contract/truffle-config.js
+++ b/contract/truffle-config.js
@@ -1,12 +1,12 @@
 const { TruffleProvider } = require('@harmony-js/core')
 //Local
-const local_private_key = process.env.LOCAL_PRIVATE_KEY
-const local_0_url = process.env.LOCAL_SHARD_0_URL
-const local_1_url = process.env.LOCAL_SHARD_1_URL
+const local_private_key = process.env.HARMONY_LOCAL_PRIVATE_KEY
+const local_0_url = process.env.HARMONY_LOCAL_SHARD_0_URL
+const local_1_url = process.env.HARMONY_LOCAL_SHARD_1_URL
 
 //GAS - Currently using same GAS accross all environments
-gasLimit = process.env.GAS_LIMIT
-gasPrice = process.env.GAS_PRICE
+const gasLimit = process.env.HARMONY_GAS_LIMIT
+const gasPrice = process.env.HARMONY_GAS_PRICE
 
 module.exports = {
   // TODO
diff --git a/scripts/check_shard.sh b/scripts/check_shard.sh
index 2cf6bcd..a04ae85 100755
--- a/scripts/check_shard.sh
+++ b/scripts/check_shard.sh
@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 set -e
 
-expected_shard0_url=${LOCAL_SHARD_0_URL}
-expected_shard1_url=${LOCAL_SHARD_1_URL}
+expected_shard0_url=${HARMONY_LOCAL_SHARD_0_URL}
+expected_shard1_url=${HARMONY_LOCAL_SHARD_1_URL}
 max_shard=1
 
 function check() {