diff --git a/core.js b/core.js
index ae1bea62..0526f31b 100644
--- a/core.js
+++ b/core.js
@@ -59,6 +59,11 @@ function getFileTypeFromMimeType(mimeType) {
 				ext: 'docx',
 				mime: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
 			};
+		case 'application/vnd.openxmlformats-officedocument.presentationml.template':
+			return {
+				ext: 'potx',
+				mime: 'application/vnd.openxmlformats-officedocument.presentationml.template',
+			};
 		case 'application/vnd.openxmlformats-officedocument.presentationml.presentation':
 			return {
 				ext: 'pptx',
diff --git a/fixture/fixture.potx b/fixture/fixture.potx
new file mode 100644
index 00000000..c83cd145
Binary files /dev/null and b/fixture/fixture.potx differ
diff --git a/package.json b/package.json
index 72a1b0e0..9c296e4c 100644
--- a/package.json
+++ b/package.json
@@ -219,7 +219,8 @@
 		"vtt",
 		"apk",
 		"drc",
-		"lz4"
+		"lz4",
+		"potx"
 	],
 	"dependencies": {
 		"@tokenizer/inflate": "^0.2.6",
diff --git a/readme.md b/readme.md
index 01f81af5..76560a38 100644
--- a/readme.md
+++ b/readme.md
@@ -529,6 +529,7 @@ abortController.abort(); // Abort file-type reading from the Blob stream.
 - [`pdf`](https://en.wikipedia.org/wiki/Portable_Document_Format) - Portable Document Format
 - [`pgp`](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) - Pretty Good Privacy
 - [`png`](https://en.wikipedia.org/wiki/Portable_Network_Graphics) - Portable Network Graphics
+- [`potx`](https://en.wikipedia.org/wiki/List_of_Microsoft_Office_filename_extensions) - Microsoft Powerpoint template
 - [`pptx`](https://en.wikipedia.org/wiki/Office_Open_XML) - Microsoft Powerpoint document
 - [`ps`](https://en.wikipedia.org/wiki/Postscript) - Postscript
 - [`psd`](https://en.wikipedia.org/wiki/Adobe_Photoshop#File_format) - Adobe Photoshop document
diff --git a/supported.js b/supported.js
index de560c1e..a13e6050 100644
--- a/supported.js
+++ b/supported.js
@@ -156,6 +156,7 @@ export const extensions = [
 	'apk',
 	'drc',
 	'lz4',
+	'potx',
 ];
 
 export const mimeTypes = [
@@ -311,4 +312,5 @@ export const mimeTypes = [
 	'application/vnd.android.package-archive',
 	'application/vnd.google.draco', // Invented by us
 	'application/x-lz4', // Invented by us
+	'application/vnd.openxmlformats-officedocument.presentationml.template',
 ];