doc/Storage |  4 ++++
 go.mod      |  2 +-
 hr-pkg.tmpl |  2 ++
 list.go     | 15 +++++++++++++++
 list.tmpl   |  2 +-
 main.go     |  2 +-
 metadata.go |  1 +
 refresh.go  | 22 ++++++++++++++++++++++

diff --git a/doc/Storage b/doc/Storage
index 481073cc7941b5043972839d30f6a46b75a71be567fd6e1573337c86701e1ad9..76d21a944375f8cc34fe702e5995409ce664339fb10c4c3029fdaf8c26e2bfca 100644
--- a/doc/Storage
+++ b/doc/Storage
@@ -9,12 +9,14 @@       |     +- public-package-0.1.1.tar.gz.blake2b_256
       |     +- public-package-0.2.tar.gz
       |     +- public-package-0.2.tar.gz.sha256
       |     +- public-package-0.2.tar.gz.blake2b_256
+      |     +- public-package-0.2.tar.gz.reqpy
       +-- private-package
       |     +- .internal
       |     +- .metadata.rec
       |     +- private-package-0.1.tar.gz
       |     +- private-package-0.1.tar.gz.sha256
       |     +- private-package-0.1.tar.gz.blake2b_256
+      |     +- private-package-0.1.tar.gz.reqpy
       |...
 
 Each directory is a normalized package name. When you try to list non
@@ -46,3 +48,5 @@ PyPI. You have to create it manually.
 
 Each packages release file has mtime set to its upload time. Package's
 serial is a sum of mtime's of the directory and .metadata.rec (if it exists).
+
+Optional .reqpy file contains the PEP-345's Requires-Python string.
diff --git a/go.mod b/go.mod
index 206ccdae71dc10da4a43e320e33bfb842152e071be262befae6268193cb483dd..03aeb3de87e5ac8188d89e428db1eb47aa1bded40f90be34f32126e7dde21b57 100644
--- a/go.mod
+++ b/go.mod
@@ -1,4 +1,4 @@
-module go.stargrave.org/gocheese/v5
+module go.stargrave.org/gocheese/v6
 
 go 1.24.0
 
diff --git a/hr-pkg.tmpl b/hr-pkg.tmpl
index 16fb5478078761f682b214767e25c98a2d05dd74bd73468ae15130cb91a48c7b..389f61859f24aeb5ed679c22badc5f1d39245274512ec1d1f5b5af7e1f7105ed 100644
--- a/hr-pkg.tmpl
+++ b/hr-pkg.tmpl
@@ -58,6 +58,7 @@     <table border=1>
     <tr>
       <th>Filename</th>
       <th>Version</th>
+      <th>Python</th>
       <th>Uploaded</th>
       <th>Size</th>
       <th>Digests</th>
@@ -66,6 +67,7 @@     {{range .Releases}}{{if .Size}}
     <tr>
       <td>{{.Filename}}</th>
       <td>{{.Version}}</th>
+      <td>{{.ReqPy}}</th>
       <td>{{.UploadTimeISO8601}}</th>
       <td>{{.Size}}</th>
       <td><ul>{{range $a, $d := .Digests}}
diff --git a/list.go b/list.go
index 2da3dae76c6f4ada6a51d398f38477034963c72a8a287fbbabbf178325d3e4dd..d55c27561bdad1162427af4312659fae7b79028d9e46faa8a02026dc3d4d1032 100644
--- a/list.go
+++ b/list.go
@@ -182,6 +182,21 @@ 			}
 			release.Digests[algo] = hex.EncodeToString(digest)
 		}
 	}
+	for fn := range files {
+		if !strings.HasSuffix(fn, ReqPyExt) {
+			continue
+		}
+		delete(files, fn)
+		var reqPy []byte
+		reqPy, err = os.ReadFile(filepath.Join(dirPath, fn))
+		if err != nil {
+			return 0, nil, err
+		}
+		fnClean := strings.TrimSuffix(fn, ReqPyExt)
+		if release := releaseFiles[fnClean]; release != nil {
+			release.ReqPy = string(reqPy)
+		}
+	}
 	releases := make([]*PkgReleaseInfo, 0, len(releaseFiles))
 	for _, release := range releaseFiles {
 		releases = append(releases, release)
diff --git a/list.tmpl b/list.tmpl
index 472c3145eafbecca892480196f9ad0472ce8ddfde16988efd717f247c105576a..6a6fd6d3ed740a77054b0dba9e05658e5507fdde28bb0fa66c5f30c4d9b6ee49 100644
--- a/list.tmpl
+++ b/list.tmpl
@@ -6,7 +6,7 @@     <title>Links for {{.PkgName}}</title>
   </head>
   <body>{{$Refresh := .RefreshURLPath}}{{$PkgName := .PkgName}}{{range .Releases}}
     <a href="{{$Refresh}}{{$PkgName}}/{{.Filename -}}
-        #{{range $a, $d := .Digests}}{{$a}}={{$d}}{{end -}}">{{.Filename}}</a><br/>
+        #{{range $a, $d := .Digests}}{{$a}}={{$d}}{{end -}}"{{with .ReqPy}} data-requires-python="{{.}}"{{end}}>{{.Filename}}</a><br/>
 {{- end}}
   </body>
 </html>
diff --git a/main.go b/main.go
index 3023f1937242127726f24f769f0fc9afcd8494565b3b7aabd17c3b54c0e19bad..edf9f9c47ea497cd771b6acc5661b12a86a1381e3385c959e38985c572e94114 100644
--- a/main.go
+++ b/main.go
@@ -42,7 +42,7 @@ 	"golang.org/x/net/netutil"
 )
 
 const (
-	Version   = "5.0.0"
+	Version   = "6.0.0"
 	UserAgent = "GoCheese/" + Version
 )
 
diff --git a/metadata.go b/metadata.go
index 4b71edd3cd4e671da8d1b66ed4de9eca3653a7d53defda6bed753b72068c079b..333c2dfddd001d4610506095da25dbe79d4e8180da8d24138cfe17540577afcc 100644
--- a/metadata.go
+++ b/metadata.go
@@ -141,6 +141,7 @@ 	Digests           map[string]string `json:"digests"`
 	Filename          string            `json:"filename"`
 	Version           string            `json:"version"`
 	UploadTimeISO8601 string            `json:"upload_time_iso_8601"`
+	ReqPy             string            `json:"requires_python"`
 	Size              int64             `json:"size"`
 	HasSig            bool              `json:"has_sig"`
 }
diff --git a/refresh.go b/refresh.go
index 24d5793ed60296fef5e8294631e0b46ff23571badb22a16f59aa7f1b086e8f2e..3ae8e5e221b2ac207b4079ea721e7c1fb3e7ffc611da2b3329dc36132a24e163 100644
--- a/refresh.go
+++ b/refresh.go
@@ -25,6 +25,7 @@ 	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"hash"
+	"html"
 	"io"
 	"io/fs"
 	"log"
@@ -46,10 +47,12 @@ 	HashAlgoSHA256     = "sha256"
 	HashAlgoSHA512     = "sha512"
 	HashAlgoMD5        = "md5"
 	InternalFlag       = ".internal"
+	ReqPyExt           = ".reqpy"
 )
 
 var (
 	PkgPyPI           = regexp.MustCompile(`^.*<a href="([^"]+)"[^>]*>(.+)</a>.*$`)
+	DataRequiresPy    = regexp.MustCompile(`data-requires-python="([^"]+)"`)
 	PyPIURLParsed     *url.URL
 	PyPIHTTPTransport http.Transport
 	KnownHashAlgos    []string = []string{
@@ -339,6 +342,11 @@ 			log.Println("error", r.RemoteAddr, "refresh", uri, err)
 			http.Error(w, err.Error(), http.StatusBadGateway)
 			return false
 		}
+		var reqPy string
+		submatches = DataRequiresPy.FindStringSubmatch(string(lineRaw))
+		if len(submatches) != 0 {
+			reqPy = html.UnescapeString(submatches[1])
+		}
 
 		var hashAlgo string
 		var hasherNew func() hash.Hash
@@ -568,6 +576,20 @@ 				log.Println(r.RemoteAddr, "pypi", filename, "touch")
 				if err = os.Chtimes(path, mtime, mtime); err != nil {
 					log.Println("error", r.RemoteAddr, "pypi", filename, err)
 					http.Error(w, err.Error(), http.StatusInternalServerError)
+				}
+			}
+		}
+
+		if reqPy != "" {
+			reqPyPath := path + ReqPyExt
+			got, _ := os.ReadFile(reqPyPath)
+			if reqPy != string(got) {
+				if err = WriteFileSync(
+					dirPath, reqPyPath, []byte(reqPy), mtime,
+				); err != nil {
+					log.Println("error", r.RemoteAddr, "pypi", path, err)
+					http.Error(w, err.Error(), http.StatusInternalServerError)
+					return false
 				}
 			}
 		}