diff --git a/cmd/infra/stcrashreceiver/main.go b/cmd/infra/stcrashreceiver/main.go
index a7f3c442b..6c434147e 100644
--- a/cmd/infra/stcrashreceiver/main.go
+++ b/cmd/infra/stcrashreceiver/main.go
@@ -118,7 +118,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 		bs, err := io.ReadAll(lr)
 		req.Body.Close()
 		if err != nil {
-			http.Error(w, err.Error(), 500)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
 
@@ -130,7 +130,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 		var reports []ur.FailureReport
 		err = json.Unmarshal(bs, &reports)
 		if err != nil {
-			http.Error(w, err.Error(), 400)
+			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
 		if len(reports) == 0 {
@@ -141,7 +141,7 @@ func handleFailureFn(dsn, failureDir string, ignore *ignorePatterns) func(w http
 
 		version, err := build.ParseVersion(reports[0].Version)
 		if err != nil {
-			http.Error(w, err.Error(), 400)
+			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}
 		for _, r := range reports {
diff --git a/cmd/syncthing/cli/config.go b/cmd/syncthing/cli/config.go
index f862416cc..79cde4848 100644
--- a/cmd/syncthing/cli/config.go
+++ b/cmd/syncthing/cli/config.go
@@ -10,6 +10,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"net/http"
 	"reflect"
 
 	"github.com/AudriusButkevicius/recli"
@@ -86,7 +87,7 @@ func (h *configHandler) configAfter(_ *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	if resp.StatusCode != 200 {
+	if resp.StatusCode != http.StatusOK {
 		body, err := responseToBArray(resp)
 		if err != nil {
 			return err
diff --git a/cmd/syncthing/cli/errors.go b/cmd/syncthing/cli/errors.go
index d3fee56cb..c17e00c38 100644
--- a/cmd/syncthing/cli/errors.go
+++ b/cmd/syncthing/cli/errors.go
@@ -9,6 +9,7 @@ package cli
 import (
 	"errors"
 	"fmt"
+	"net/http"
 	"strings"
 
 	"github.com/alecthomas/kong"
@@ -34,7 +35,7 @@ func (e *errorsPushCommand) Run(ctx Context) error {
 	if err != nil {
 		return err
 	}
-	if response.StatusCode != 200 {
+	if response.StatusCode != http.StatusOK {
 		errStr = fmt.Sprint("Failed to push error\nStatus code: ", response.StatusCode)
 		bytes, err := responseToBArray(response)
 		if err != nil {
diff --git a/cmd/syncthing/cli/operations.go b/cmd/syncthing/cli/operations.go
index 82dbee85c..569d1b00a 100644
--- a/cmd/syncthing/cli/operations.go
+++ b/cmd/syncthing/cli/operations.go
@@ -10,6 +10,7 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"net/http"
 	"path/filepath"
 
 	"github.com/alecthomas/kong"
@@ -63,7 +64,7 @@ func (f *folderOverrideCommand) Run(ctx Context) error {
 			if err != nil {
 				return err
 			}
-			if response.StatusCode != 200 {
+			if response.StatusCode != http.StatusOK {
 				errStr := fmt.Sprint("Failed to override changes\nStatus code: ", response.StatusCode)
 				bytes, err := responseToBArray(response)
 				if err != nil {
diff --git a/cmd/syncthing/main.go b/cmd/syncthing/main.go
index ed20c0332..6618a77ec 100644
--- a/cmd/syncthing/main.go
+++ b/cmd/syncthing/main.go
@@ -388,8 +388,8 @@ func upgradeViaRest() error {
 	}
 	u.Path = path.Join(u.Path, "rest/system/upgrade")
 	target := u.String()
-	r, _ := http.NewRequest("POST", target, nil)
-	r.Header.Set("X-API-Key", cfg.GUI().APIKey)
+	r, _ := http.NewRequest(http.MethodPost, target, nil)
+	r.Header.Set("X-Api-Key", cfg.GUI().APIKey)
 
 	tr := &http.Transport{
 		DialContext:     dialer.DialContext,
@@ -407,7 +407,7 @@ func upgradeViaRest() error {
 
 	defer resp.Body.Close()
 
-	if resp.StatusCode != 200 {
+	if resp.StatusCode != http.StatusOK {
 		bs, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return err
diff --git a/lib/api/api.go b/lib/api/api.go
index 2682638c6..6791123f9 100644
--- a/lib/api/api.go
+++ b/lib/api/api.go
@@ -546,7 +546,7 @@ func corsMiddleware(next http.Handler, allowFrameLoading bool) http.Handler {
 	// See https://www.w3.org/TR/cors/ for details.
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		// Process OPTIONS requests
-		if r.Method == "OPTIONS" {
+		if r.Method == http.MethodOptions {
 			// Add a generous access-control-allow-origin header for CORS requests
 			w.Header().Add("Access-Control-Allow-Origin", "*")
 			// Only GET/POST/OPTIONS Methods are supported
@@ -557,7 +557,7 @@ func corsMiddleware(next http.Handler, allowFrameLoading bool) http.Handler {
 			w.Header().Set("Access-Control-Max-Age", "600")
 
 			// Indicate that no content will be returned
-			w.WriteHeader(204)
+			w.WriteHeader(http.StatusNoContent)
 
 			return
 		}
diff --git a/lib/rc/rc.go b/lib/rc/rc.go
index e218c33d3..7386ffac0 100644
--- a/lib/rc/rc.go
+++ b/lib/rc/rc.go
@@ -173,7 +173,7 @@ func (p *Process) Get(path string) ([]byte, error) {
 	}
 
 	url := fmt.Sprintf("http://%s%s", p.addr, path)
-	req, err := http.NewRequest("GET", url, nil)
+	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -198,7 +198,7 @@ func (p *Process) Post(path string, data io.Reader) ([]byte, error) {
 		},
 	}
 	url := fmt.Sprintf("http://%s%s", p.addr, path)
-	req, err := http.NewRequest("POST", url, data)
+	req, err := http.NewRequest(http.MethodPost, url, data)
 	if err != nil {
 		return nil, err
 	}
@@ -397,7 +397,7 @@ func (*Process) readResponse(resp *http.Response) ([]byte, error) {
 	if err != nil {
 		return bs, err
 	}
-	if resp.StatusCode != 200 {
+	if resp.StatusCode != http.StatusOK {
 		return bs, errors.New(resp.Status)
 	}
 	return bs, nil
diff --git a/lib/relay/client/dynamic.go b/lib/relay/client/dynamic.go
index 7b73e7eba..fc18104d5 100644
--- a/lib/relay/client/dynamic.go
+++ b/lib/relay/client/dynamic.go
@@ -48,7 +48,7 @@ func (c *dynamicClient) serve(ctx context.Context) error {
 
 	l.Debugln(c, "looking up dynamic relays")
 
-	req, err := http.NewRequestWithContext(ctx, "GET", uri.String(), nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, uri.String(), nil)
 	if err != nil {
 		l.Debugln(c, "failed to lookup dynamic relays", err)
 		return err
diff --git a/lib/upgrade/upgrade_supported.go b/lib/upgrade/upgrade_supported.go
index 6fb8e43f4..d64dd3b10 100644
--- a/lib/upgrade/upgrade_supported.go
+++ b/lib/upgrade/upgrade_supported.go
@@ -222,7 +222,7 @@ func upgradeToURL(archiveName, binary string, url string) error {
 func readRelease(archiveName, dir, url string) (string, error) {
 	l.Debugf("loading %q", url)
 
-	req, err := http.NewRequest("GET", url, nil)
+	req, err := http.NewRequest(http.MethodGet, url, nil)
 	if err != nil {
 		return "", err
 	}
diff --git a/lib/upnp/upnp.go b/lib/upnp/upnp.go
index 432d410c2..6a0235ec4 100644
--- a/lib/upnp/upnp.go
+++ b/lib/upnp/upnp.go
@@ -578,7 +578,7 @@ func soapRequestWithIP(ctx context.Context, url, service, function, message stri
 
 	body := fmt.Sprintf(template, message)
 
-	req, err := http.NewRequestWithContext(ctx, "POST", url, strings.NewReader(body))
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, strings.NewReader(body))
 	if err != nil {
 		return resp, err
 	}
diff --git a/lib/ur/usage_report.go b/lib/ur/usage_report.go
index eb7edca8a..28766bce7 100644
--- a/lib/ur/usage_report.go
+++ b/lib/ur/usage_report.go
@@ -366,7 +366,7 @@ func (s *Service) sendUsageReport(ctx context.Context) error {
 			},
 		},
 	}
-	req, err := http.NewRequestWithContext(ctx, "POST", s.cfg.Options().URURL, &b)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, s.cfg.Options().URURL, &b)
 	if err != nil {
 		return err
 	}