diff --git a/lib/index.js b/lib/index.js
index b82bdbe..d930add 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -4,6 +4,7 @@ const crypto = require('crypto')
 const MiniPass = require('minipass')
 
 const SPEC_ALGORITHMS = ['sha256', 'sha384', 'sha512']
+const DEFAULT_ALGORITHMS = ['sha512']
 
 // TODO: this should really be a hardcoded list of algorithms we support,
 // rather than [a-z0-9].
@@ -12,19 +13,7 @@ const SRI_REGEX = /^([a-z0-9]+)-([^?]+)([?\S*]*)$/
 const STRICT_SRI_REGEX = /^([a-z0-9]+)-([A-Za-z0-9+/=]{44,88})(\?[\x21-\x7E]*)?$/
 const VCHAR_REGEX = /^[\x21-\x7E]+$/
 
-const defaultOpts = {
-  algorithms: ['sha512'],
-  error: false,
-  options: [],
-  pickAlgorithm: getPrioritizedHash,
-  sep: ' ',
-  single: false,
-  strict: false,
-}
-
-const getOptString = options => !options || !options.length
-  ? ''
-  : `?${options.join('?')}`
+const getOptString = options => options?.length ? `?${options.join('?')}` : ''
 
 const _onEnd = Symbol('_onEnd')
 const _getOptions = Symbol('_getOptions')
@@ -42,7 +31,7 @@ class IntegrityStream extends MiniPass {
     this[_getOptions]()
 
     // options used for calculating stream.  can't be changed.
-    const algorithms = opts?.algorithms || defaultOpts.algorithms
+    const algorithms = opts?.algorithms || DEFAULT_ALGORITHMS
     this.algorithms = Array.from(
       new Set(algorithms.concat(this.algorithm ? [this.algorithm] : []))
     )
@@ -193,10 +182,7 @@ class Hash {
         return ''
       }
     }
-    const options = this.options && this.options.length
-      ? `?${this.options.join('?')}`
-      : ''
-    return `${this.algorithm}-${this.digest}${options}`
+    return `${this.algorithm}-${this.digest}${getOptString(this.options)}`
   }
 }
 
@@ -272,7 +258,7 @@ class Integrity {
   }
 
   pickAlgorithm (opts) {
-    const pickAlgorithm = opts?.pickAlgorithm || defaultOpts.pickAlgorithm;
+    const pickAlgorithm = opts?.pickAlgorithm || getPrioritizedHash
     const keys = Object.keys(this)
     return keys.reduce((acc, algo) => {
       return pickAlgorithm(acc, algo) || acc
@@ -339,7 +325,7 @@ function fromHex (hexDigest, algorithm, opts) {
 
 module.exports.fromData = fromData
 function fromData (data, opts) {
-  const algorithms = opts?.algorithms || defaultOpts.algorithms
+  const algorithms = opts?.algorithms || DEFAULT_ALGORITHMS
   const optString = getOptString(opts?.options)
   return algorithms.reduce((acc, algo) => {
     const digest = crypto.createHash(algo).update(data).digest('base64')
@@ -451,7 +437,7 @@ function integrityStream (opts = Object.create(null)) {
 
 module.exports.create = createIntegrity
 function createIntegrity (opts) {
-  const algorithms = opts?.algorithms || defaultOpts.algorithms
+  const algorithms = opts?.algorithms || DEFAULT_ALGORITHMS
   const optString = getOptString(opts?.options)
 
   const hashes = algorithms.map(crypto.createHash)