diff --git a/modules/setting/attachment.go b/modules/setting/attachment.go
index 0fdabb503..4255ac985 100644
--- a/modules/setting/attachment.go
+++ b/modules/setting/attachment.go
@@ -12,7 +12,7 @@ var Attachment = struct {
 	Enabled      bool
 }{
 	Storage:      &Storage{},
-	AllowedTypes: ".cpuprofile,.csv,.dmp,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.json,.jsonc,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip",
+	AllowedTypes: ".cpuprofile,.csv,.dmp,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.json,.jsonc,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.webp,.xls,.xlsx,.zip",
 	MaxSize:      2048,
 	MaxFiles:     5,
 	Enabled:      true,
@@ -25,7 +25,7 @@ func loadAttachmentFrom(rootCfg ConfigProvider) (err error) {
 		return err
 	}
 
-	Attachment.AllowedTypes = sec.Key("ALLOWED_TYPES").MustString(".cpuprofile,.csv,.dmp,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.json,.jsonc,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.xls,.xlsx,.zip")
+	Attachment.AllowedTypes = sec.Key("ALLOWED_TYPES").MustString(".cpuprofile,.csv,.dmp,.docx,.fodg,.fodp,.fods,.fodt,.gif,.gz,.jpeg,.jpg,.json,.jsonc,.log,.md,.mov,.mp4,.odf,.odg,.odp,.ods,.odt,.patch,.pdf,.png,.pptx,.svg,.tgz,.txt,.webm,.webp,.xls,.xlsx,.zip")
 	Attachment.MaxSize = sec.Key("MAX_SIZE").MustInt64(2048)
 	Attachment.MaxFiles = sec.Key("MAX_FILES").MustInt(5)
 	Attachment.Enabled = sec.Key("ENABLED").MustBool(true)
diff --git a/release-notes/4605.md b/release-notes/4605.md
new file mode 100644
index 000000000..90d0ed545
--- /dev/null
+++ b/release-notes/4605.md
@@ -0,0 +1 @@
+feat: the default setting attachment.ALLOWED_TYPES was adjusted to allow .webp attachments in issues - a more efficient format for images like screenshots. All attachments are treated as normal files and are not re-encoded by Forgejo. If you have customized this setting, you may also want to add .webp to it for the benefit of your users, as well as to reduce server traffic and storage usage.