diff --git a/docs/generate.js b/docs/generate.js
index 2f3ba6e56..59cbeb4b5 100644
--- a/docs/generate.js
+++ b/docs/generate.js
@@ -286,7 +286,7 @@ const render = (doc, filename) => {
 };
 
 // renders the title page of the guide
-const renderTitlePage = (doc) => {
+const renderTitlePage = doc => {
   const title = 'PDFKit Guide';
   const author = 'By Devon Govett';
   const version = `Version ${require('../package.json').version}`;
diff --git a/docs/generate_website.js b/docs/generate_website.js
index 07a503c2d..8323dd0f7 100644
--- a/docs/generate_website.js
+++ b/docs/generate_website.js
@@ -87,15 +87,18 @@ const generateImages = function(tree) {
 
       // write the PDF, convert to PNG and trim with ImageMagick (https://imagemagick.org)
       file.on('finish', () => {
-        exec(`magick convert -density 150x150 -trim ${f}.pdf ${f}.png`, (err, stdout, stderr) => {
-          if (stderr) {
-            console.error(stderr);
+        exec(
+          `magick convert -density 150x150 -trim ${f}.pdf ${f}.png`,
+          (err, stdout, stderr) => {
+            if (stderr) {
+              console.error(stderr);
+            }
+            if (err) {
+              console.error(err);
+            }
+            fs.unlinkSync(`${f}.pdf`);
           }
-          if (err) {
-            console.error(err);
-          }
-          fs.unlinkSync(`${f}.pdf`);
-        });
+        );
       });
 
       doc.end();
diff --git a/lib/document.js b/lib/document.js
index 6f0e3b516..d75e56abe 100644
--- a/lib/document.js
+++ b/lib/document.js
@@ -285,7 +285,7 @@ Please pipe the document into a Node stream.\
     }
   }
 
-  _finalize(fn) {
+  _finalize() {
     // generate xref
     const xRefOffset = this._offset;
     this._write('xref');
diff --git a/lib/mixins/acroform.js b/lib/mixins/acroform.js
index 755c9d1ee..4df990fb5 100644
--- a/lib/mixins/acroform.js
+++ b/lib/mixins/acroform.js
@@ -361,9 +361,6 @@ export default {
       options.Opt = select;
     }
 
-    if (options.value || options.defaultValue) {
-      let x = 0;
-    }
     Object.keys(VALUE_MAP).forEach(key => {
       if (options[key] !== undefined) {
         options[VALUE_MAP[key]] = options[key];
diff --git a/lib/mixins/vector.js b/lib/mixins/vector.js
index c0a3d623a..226a0940c 100644
--- a/lib/mixins/vector.js
+++ b/lib/mixins/vector.js
@@ -68,8 +68,12 @@ export default {
     }
 
     const valid = length.every(x => Number.isFinite(x) && x > 0);
-    if(!valid) {
-      throw new Error(`dash(${JSON.stringify(originalLength)}, ${JSON.stringify(options)}) invalid, lengths must be numeric and greater than zero`);
+    if (!valid) {
+      throw new Error(
+        `dash(${JSON.stringify(originalLength)}, ${JSON.stringify(
+          options
+        )}) invalid, lengths must be numeric and greater than zero`
+      );
     }
 
     length = length.map(number).join(' ');
diff --git a/lib/name_tree.js b/lib/name_tree.js
index fcb446d22..c3e423bb8 100644
--- a/lib/name_tree.js
+++ b/lib/name_tree.js
@@ -5,13 +5,12 @@ PDFNameTree - represents a name tree object
 import PDFObject from './object';
 
 class PDFNameTree {
-
   constructor() {
     this._items = {};
   }
 
   add(key, val) {
-    return this._items[key] = val;
+    return (this._items[key] = val);
   }
 
   get(key) {
@@ -20,16 +19,25 @@ class PDFNameTree {
 
   toString() {
     // Needs to be sorted by key
-    const sortedKeys = (Object.keys(this._items)).sort((a, b) => a.localeCompare(b));
+    const sortedKeys = Object.keys(this._items).sort((a, b) =>
+      a.localeCompare(b)
+    );
 
     const out = ['<<'];
     if (sortedKeys.length > 1) {
-      const first = sortedKeys[0], last = sortedKeys[sortedKeys.length - 1];
-      out.push(`  /Limits ${PDFObject.convert([new String(first), new String(last)])}`);
+      const first = sortedKeys[0],
+        last = sortedKeys[sortedKeys.length - 1];
+      out.push(
+        `  /Limits ${PDFObject.convert([new String(first), new String(last)])}`
+      );
     }
     out.push('  /Names [');
     for (let key of sortedKeys) {
-      out.push(`    ${PDFObject.convert(new String(key))} ${PDFObject.convert(this._items[key])}`);
+      out.push(
+        `    ${PDFObject.convert(new String(key))} ${PDFObject.convert(
+          this._items[key]
+        )}`
+      );
     }
     out.push(']');
     out.push('>>');
@@ -37,4 +45,4 @@ class PDFNameTree {
   }
 }
 
-export default PDFNameTree;
\ No newline at end of file
+export default PDFNameTree;
diff --git a/lib/object.js b/lib/object.js
index 3f50359bf..c92461bc6 100644
--- a/lib/object.js
+++ b/lib/object.js
@@ -8,7 +8,7 @@ import PDFNameTree from './name_tree';
 
 const pad = (str, length) => (Array(length + 1).join('0') + str).slice(-length);
 
-const escapableRe = /[\n\r\t\b\f\(\)\\]/g;
+const escapableRe = /[\n\r\t\b\f()\\]/g;
 const escapable = {
   '\n': '\\n',
   '\r': '\\r',
@@ -77,7 +77,10 @@ class PDFObject {
       // Buffers are converted to PDF hex strings
     } else if (Buffer.isBuffer(object)) {
       return `<${object.toString('hex')}>`;
-    } else if (object instanceof PDFAbstractReference || object instanceof PDFNameTree) {
+    } else if (
+      object instanceof PDFAbstractReference ||
+      object instanceof PDFNameTree
+    ) {
       return object.toString();
     } else if (object instanceof Date) {
       let string =
diff --git a/lib/saslprep/lib/code-points.js b/lib/saslprep/lib/code-points.js
index 189050cae..fbe07e573 100644
--- a/lib/saslprep/lib/code-points.js
+++ b/lib/saslprep/lib/code-points.js
@@ -1,6 +1,6 @@
 import { inRange } from './util';
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 /**
  * A.1 Unassigned code points in Unicode 3.2
  * @link https://tools.ietf.org/html/rfc3454#appendix-A.1
@@ -799,12 +799,12 @@ const unassigned_code_points = [
   0xe0080,
   0xefffd
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isUnassignedCodePoint = character =>
   inRange(character, unassigned_code_points);
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 /**
  * B.1 Commonly mapped to nothing
  * @link https://tools.ietf.org/html/rfc3454#appendix-B.1
@@ -865,12 +865,12 @@ const commonly_mapped_to_nothing = [
   0xfeff,
   0xfeff
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isCommonlyMappedToNothing = character =>
   inRange(character, commonly_mapped_to_nothing);
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 /**
  * C.1.2 Non-ASCII space characters
  * @link https://tools.ietf.org/html/rfc3454#appendix-C.1.2
@@ -911,12 +911,12 @@ const non_ASCII_space_characters = [
   0x3000,
   0x3000 /* IDEOGRAPHIC SPACE */
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isNonASCIISpaceCharacter = character =>
   inRange(character, non_ASCII_space_characters);
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 const non_ASCII_controls_characters = [
   /**
    * C.2.2 Non-ASCII control characters
@@ -1100,7 +1100,7 @@ const prohibited_characters = [
   0x100000,
   0x10fffd /* [PRIVATE USE, PLANE 16] */
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isProhibitedCharacter = character =>
   inRange(character, non_ASCII_space_characters) ||
@@ -1108,7 +1108,7 @@ const isProhibitedCharacter = character =>
   inRange(character, non_ASCII_controls_characters) ||
   inRange(character, non_character_codepoints);
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 /**
  * D.1 Characters with bidirectional property "R" or "AL"
  * @link https://tools.ietf.org/html/rfc3454#appendix-D.1
@@ -1183,11 +1183,11 @@ const bidirectional_r_al = [
   0xfe76,
   0xfefc
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isBidirectionalRAL = character => inRange(character, bidirectional_r_al);
 
-/* eslint-disable prettier/prettier */
+// prettier-ignore-start
 /**
  * D.2 Characters with bidirectional property "L"
  * @link https://tools.ietf.org/html/rfc3454#appendix-D.2
@@ -1914,7 +1914,7 @@ const bidirectional_l = [
   0x100000,
   0x10fffd
 ];
-/* eslint-enable */
+// prettier-ignore-end
 
 const isBidirectionalL = character => inRange(character, bidirectional_l);
 
diff --git a/lib/security.js b/lib/security.js
index 80d7e550f..e5421cc45 100644
--- a/lib/security.js
+++ b/lib/security.js
@@ -11,6 +11,7 @@ class PDFSecurity {
     let infoStr = `${info.CreationDate.getTime()}\n`;
 
     for (let key in info) {
+      // eslint-disable-next-line no-prototype-builtins
       if (!info.hasOwnProperty(key)) {
         continue;
       }
diff --git a/tests/unit/acroform.spec.js b/tests/unit/acroform.spec.js
index 863338006..4c1db5f7c 100644
--- a/tests/unit/acroform.spec.js
+++ b/tests/unit/acroform.spec.js
@@ -66,7 +66,7 @@ describe('acroform', () => {
   test('init no fonts', () => {
     doc.addPage();
     const docData = logData(doc);
-    const font = PDFFontFactory.open(doc, 'tests/fonts/Roboto-Regular.ttf');
+    PDFFontFactory.open(doc, 'tests/fonts/Roboto-Regular.ttf');
     doc.initForm();
     expect(docData.length).toBe(0);
   });