diff --git a/lib/index.js b/lib/index.js
index ec08100..6054f39 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -13,16 +13,15 @@ class TokenTracker extends SafeEventEmitter {
 
     this.includeFailedTokens = opts.includeFailedTokens || false
     this.userAddress = opts.userAddress || '0x0'
-    this.provider = opts.provider
     const pollingInterval = opts.pollingInterval || 4000
     this.blockTracker = new PollingBlockTracker({
-      provider: this.provider,
+      provider: opts.provider,
       pollingInterval,
     })
 
-    this.eth = new Eth(this.provider)
-    this.contract = new EthContract(this.eth)
-    this.TokenContract = this.contract(abi)
+    const eth = new Eth(opts.provider)
+    const contract = new EthContract(eth)
+    this.TokenContract = contract(abi)
 
     const tokens = opts.tokens || []
     this.balanceDecimals = opts.balanceDecimals