diff --git a/js/src/evm/memory.js b/js/src/evm/memory.js
index 847fa17..a8adac4 100644
--- a/js/src/evm/memory.js
+++ b/js/src/evm/memory.js
@@ -20,15 +20,15 @@ export default class Memory {
 
     const res = new Array(32).fill([-1, 0, undefined])
     for (let i = offset; i < offset + 32; i++) {
-      const idx = i - offset;
+      const idx = i - offset
       for (const [off, seq, val] of this._data) {
         if (seq > res[idx][0] && i >= off && i < off + val.length) {
-          res[idx] = [seq, val[i-off], val]
+          res[idx] = [seq, val[i - off], val]
         }
       }
     }
-    const ret = new Uint8Array(res.map((v) => v[1]));
-    const used = new Set(res.map((v) => v[2]));
+    const ret = new Uint8Array(res.map((v) => v[1]))
+    const used = new Set(res.map((v) => v[2]))
     return [ret, used]
   }
 }
diff --git a/js/src/evm/stack.js b/js/src/evm/stack.js
index 93a853a..6181239 100644
--- a/js/src/evm/stack.js
+++ b/js/src/evm/stack.js
@@ -34,7 +34,7 @@ export default class Stack {
   }
 
   push_uint(val) {
-    this.push(bigIntToUint8Array(val));
+    this.push(bigIntToUint8Array(val))
   }
 
   pop_uint() {
diff --git a/js/src/evm/vm.js b/js/src/evm/vm.js
index 287332c..2268ae0 100644
--- a/js/src/evm/vm.js
+++ b/js/src/evm/vm.js
@@ -200,8 +200,8 @@ export default class Vm {
         let s1 = this.stack.pop_uint()
 
         // unsigned to signed
-        s0 = s0 <= E255M1 ? s0 : (s0 - E256)
-        s1 = s1 <= E255M1 ? s1 : (s1 - E256)
+        s0 = s0 <= E255M1 ? s0 : s0 - E256
+        s1 = s1 <= E255M1 ? s1 : s1 - E256
         let res
         switch (op) {
           case Op.SLT:
diff --git a/js/src/index.js b/js/src/index.js
index a7b8d8a..9ccdbe6 100644
--- a/js/src/index.js
+++ b/js/src/index.js
@@ -1,2 +1,2 @@
-export {functionSelectors} from './selectors.js'
-export {functionArguments} from './arguments.js'
+export { functionSelectors } from './selectors.js'
+export { functionArguments } from './arguments.js'
diff --git a/js/src/utils.js b/js/src/utils.js
index 8afb7d0..c36b78e 100644
--- a/js/src/utils.js
+++ b/js/src/utils.js
@@ -2,11 +2,12 @@ export function hexToUint8Array(str) {
   if (str.startsWith('0x')) {
     str = str.slice(2)
     if (str.length % 2 !== 0) {
-      str = '0' + str;
+      str = '0' + str
     }
   }
-  if (typeof Buffer !== 'undefined') { // fast path for nodejs:
-    return Buffer.from(str, 'hex');
+  if (typeof Buffer !== 'undefined') {
+    // fast path for nodejs:
+    return Buffer.from(str, 'hex')
   }
   const arr = new Uint8Array(str.length / 2)
   for (let i = 0, p = 0; i < str.length; i += 2, p += 1) {
@@ -16,16 +17,16 @@ export function hexToUint8Array(str) {
 }
 
 export function uint8ArrayToBigInt(arr) {
-    return arr.reduce((acc, b) => acc * 256n + BigInt(b), 0n)
+  return arr.reduce((acc, b) => acc * 256n + BigInt(b), 0n)
 }
 
-export function bigIntToUint8Array(val, n=32) {
-  const r = new Uint8Array(n);
-  while(n > 0) {
-    r[--n] = Number(val & 255n);
-    val >>= 8n;
+export function bigIntToUint8Array(val, n = 32) {
+  const r = new Uint8Array(n)
+  while (n > 0) {
+    r[--n] = Number(val & 255n)
+    val >>= 8n
   }
-  return r;
+  return r
 }
 
 export function toBigInt(v) {