diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index 75db944..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,36 +0,0 @@
-**/node_modules/
-**/*.log
-test/repo-tests*
-
-# Logs
-logs
-*.log
-
-coverage
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-.nyc_output
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-build
-
-# Dependency directory
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
-node_modules
-
-test
-docs
diff --git a/.travis.yml b/.travis.yml
index d0cf281..3df7565 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ stages:
 
 node_js:
   - '10'
+  - '12'
 
 os:
   - linux
diff --git a/package.json b/package.json
index a8dc979..40bc2a9 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,10 @@
     "coverage": "aegir coverage",
     "coverage-publish": "aegir coverage publish"
   },
+  "files": [
+    "src",
+    "dist"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/multiformats/js-multibase.git"
@@ -30,13 +34,14 @@
     "formats"
   ],
   "devDependencies": {
-    "aegir": "^18.1.1",
+    "aegir": "^21.3.0",
     "chai": "^4.1.2",
     "dirty-chai": "^2.0.1",
     "pre-commit": "^1.2.2"
   },
   "dependencies": {
-    "base-x": "3.0.4"
+    "base-x": "^3.0.8",
+    "buffer": "^5.5.0"
   },
   "license": "MIT",
   "bugs": {
diff --git a/src/base16.js b/src/base16.js
index 6d82c70..f911f80 100644
--- a/src/base16.js
+++ b/src/base16.js
@@ -1,4 +1,5 @@
 'use strict'
+const { Buffer } = require('buffer')
 
 module.exports = function base16 (alphabet) {
   return {
@@ -9,7 +10,7 @@ module.exports = function base16 (alphabet) {
       return input.toString('hex')
     },
     decode (input) {
-      for (let char of input) {
+      for (const char of input) {
         if (alphabet.indexOf(char) < 0) {
           throw new Error('invalid base16 character')
         }
diff --git a/src/base32.js b/src/base32.js
index e8ae456..cc38046 100644
--- a/src/base32.js
+++ b/src/base32.js
@@ -2,13 +2,13 @@
 
 function decode (input, alphabet) {
   input = input.replace(new RegExp('=', 'g'), '')
-  let length = input.length
+  const length = input.length
 
   let bits = 0
   let value = 0
 
   let index = 0
-  let output = new Uint8Array((length * 5 / 8) | 0)
+  const output = new Uint8Array((length * 5 / 8) | 0)
 
   for (let i = 0; i < length; i++) {
     value = (value << 5) | alphabet.indexOf(input[i])
@@ -24,12 +24,12 @@ function decode (input, alphabet) {
 }
 
 function encode (buffer, alphabet) {
-  let length = buffer.byteLength
-  let view = new Uint8Array(buffer)
-  let padding = alphabet.indexOf('=') === alphabet.length - 1
+  const length = buffer.byteLength
+  const view = new Uint8Array(buffer)
+  const padding = alphabet.indexOf('=') === alphabet.length - 1
 
   if (padding) {
-    alphabet = alphabet.substring(0, alphabet.length - 2)
+    alphabet = alphabet.substring(0, alphabet.length - 1)
   }
 
   let bits = 0
@@ -63,13 +63,13 @@ module.exports = function base32 (alphabet) {
   return {
     encode (input) {
       if (typeof input === 'string') {
-        return encode(Buffer.from(input), alphabet)
+        return encode(Uint8Array.from(input), alphabet)
       }
 
       return encode(input, alphabet)
     },
     decode (input) {
-      for (let char of input) {
+      for (const char of input) {
         if (alphabet.indexOf(char) < 0) {
           throw new Error('invalid base32 character')
         }
diff --git a/src/base64.js b/src/base64.js
index 8862529..c4608bb 100644
--- a/src/base64.js
+++ b/src/base64.js
@@ -1,4 +1,5 @@
 'use strict'
+const { Buffer } = require('buffer')
 
 module.exports = function base64 (alphabet) {
   // The alphabet is only used to know:
@@ -31,7 +32,7 @@ module.exports = function base64 (alphabet) {
       return output
     },
     decode (input) {
-      for (let char of input) {
+      for (const char of input) {
         if (alphabet.indexOf(char) < 0) {
           throw new Error('invalid base64 character')
         }
diff --git a/src/index.js b/src/index.js
index 3d6d9a6..1c9ebe2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -4,6 +4,7 @@
  */
 'use strict'
 
+const { Buffer } = require('buffer')
 const constants = require('./constants')
 
 exports = module.exports = multibase
diff --git a/test/multibase.spec.js b/test/multibase.spec.js
index 0ad98d6..423c17b 100644
--- a/test/multibase.spec.js
+++ b/test/multibase.spec.js
@@ -176,6 +176,14 @@ describe('multibase.encode ', () => {
       })
     })
   }
+
+  it('should allow base32pad full alphabet', () => {
+    const encodedStr = 'ctimaq4ygg2iegci7'
+    const decoded = multibase.decode(encodedStr)
+
+    const encoded = multibase.encode('c', decoded)
+    expect(encodedStr).to.be.eq(encoded.toString())
+  })
 })
 
 describe('multibase.decode', () => {