diff --git a/HISTORY.md b/HISTORY.md
index 9edbecdc..27aad1dc 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -50,7 +50,7 @@ unreleased
 ===================
 
   * Add new upstream MIME types
-  * Remove ambigious extensions from IANA for `application/*+xml` types
+  * Remove ambiguous extensions from IANA for `application/*+xml` types
   * Update primary extension to `.es` for `application/ecmascript`
 
 1.46.0 / 2021-02-13
diff --git a/README.md b/README.md
index 1de297b8..1ef748e1 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ registered with the IANA are automatically pulled into this library.
 If that is not possible / feasible, they can be added directly here as a
 "custom" type. To do this, it is required to have a primary source that
 definitively lists the media type. If an extension is going to be listed as
-associateed with this media type, the source must definitively link the
+associated with this media type, the source must definitively link the
 media type and extension as well.
 
 To edit the database, only make PRs against `src/custom-types.json` or
diff --git a/scripts/fetch-iana.js b/scripts/fetch-iana.js
index 60766210..9b209800 100644
--- a/scripts/fetch-iana.js
+++ b/scripts/fetch-iana.js
@@ -74,7 +74,7 @@ var MIME_TYPE_HAS_CHARSET_PARAMETER_REGEXP = /parameters\s*:[^.]*\bcharset\b/im
       sources: result.sources
     }
 
-    // keep unambigious extensions
+    // keep unambiguous extensions
     var extensions = (result.extensions || []).filter(function (ext) {
       return exts[ext] === 1 || typer.parse(mime).subtype === ext
     })
diff --git a/scripts/fetch-nginx.js b/scripts/fetch-nginx.js
index 758193eb..d836c05f 100644
--- a/scripts/fetch-nginx.js
+++ b/scripts/fetch-nginx.js
@@ -24,7 +24,7 @@ var TYPE_LINE_REGEXP = /^\s*([\w-]+\/[\w+.-]+)((?:\s+[\w-]+)*);\s*$/gm
 /**
  * URL for the mime.types file in the NGINX project source.
  *
- * This uses the Github.com mirror of the Mercurial repository
+ * This uses the GitHub.com mirror of the Mercurial repository
  * as the Mercurial web interface requires cookies.
  */
 var URL = 'https://raw.githubusercontent.com/nginx/nginx/master/conf/mime.types'
diff --git a/scripts/version-history.js b/scripts/version-history.js
index b8a2b0e8..c58268ad 100644
--- a/scripts/version-history.js
+++ b/scripts/version-history.js
@@ -16,7 +16,7 @@ if (!MD_HEADER_REGEXP.test(historyFileLines[1])) {
 }
 
 if (!VERSION_PLACEHOLDER_REGEXP.test(historyFileLines[0])) {
-  console.error('Missing placegolder version in HISTORY.md')
+  console.error('Missing placeholder version in HISTORY.md')
   process.exit(1)
 }