diff --git a/custom/conf/app.example.ini b/custom/conf/app.example.ini
index 1e55ce73a2..131fb3401e 100644
--- a/custom/conf/app.example.ini
+++ b/custom/conf/app.example.ini
@@ -1848,7 +1848,7 @@ ROUTER = console
 ;ENABLED = true
 ;;
 ;; Comma-separated list of allowed file extensions (`.zip`), mime types (`text/plain`) or wildcard type (`image/*`, `audio/*`, `video/*`). Empty value or `*/*` allows all types.
-;ALLOWED_TYPES = .csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip
+;ALLOWED_TYPES = .csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip
 ;;
 ;; Max size of each file. Defaults to 4MB
 ;MAX_SIZE = 4
diff --git a/docs/content/doc/advanced/config-cheat-sheet.en-us.md b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
index e0df371a0f..aca591787e 100644
--- a/docs/content/doc/advanced/config-cheat-sheet.en-us.md
+++ b/docs/content/doc/advanced/config-cheat-sheet.en-us.md
@@ -841,7 +841,7 @@ Default templates for project boards:
 ## Issue and pull request attachments (`attachment`)
 
 - `ENABLED`: **true**: Whether issue and pull request attachments are enabled.
-- `ALLOWED_TYPES`: **.csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip**: Comma-separated list of allowed file extensions (`.zip`), mime types (`text/plain`) or wildcard type (`image/*`, `audio/*`, `video/*`). Empty value or `*/*` allows all types.
+- `ALLOWED_TYPES`: **.csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip**: Comma-separated list of allowed file extensions (`.zip`), mime types (`text/plain`) or wildcard type (`image/*`, `audio/*`, `video/*`). Empty value or `*/*` allows all types.
 - `MAX_SIZE`: **4**: Maximum size (MB).
 - `MAX_FILES`: **5**: Maximum number of attachments that can be uploaded at once.
 - `STORAGE_TYPE`: **local**: Storage type for attachments, `local` for local disk or `minio` for s3 compatible object storage service, default is `local` or other name defined with `[storage.xxx]`
diff --git a/modules/setting/attachment.go b/modules/setting/attachment.go
index 8b6eb9fd7a..4d4b8e3b02 100644
--- a/modules/setting/attachment.go
+++ b/modules/setting/attachment.go
@@ -26,7 +26,7 @@ func loadAttachmentFrom(rootCfg ConfigProvider) {
 
 	Attachment.Storage = getStorage(rootCfg, "attachments", storageType, sec)
 
-	Attachment.AllowedTypes = sec.Key("ALLOWED_TYPES").MustString(".csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip")
+	Attachment.AllowedTypes = sec.Key("ALLOWED_TYPES").MustString(".csv,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip")
 	Attachment.MaxSize = sec.Key("MAX_SIZE").MustInt64(4)
 	Attachment.MaxFiles = sec.Key("MAX_FILES").MustInt(5)
 	Attachment.Enabled = sec.Key("ENABLED").MustBool(true)