diff --git a/activityPubSending.go b/activityPubSending.go
index fc4ec50..ea118cb 100644
--- a/activityPubSending.go
+++ b/activityPubSending.go
@@ -78,7 +78,6 @@ func (a *goBlog) apSendSigned(blogIri, to string, activity []byte) error {
 		return err
 	}
 	r.Header.Set("Accept-Charset", "utf-8")
-	r.Header.Set(userAgent, appUserAgent)
 	r.Header.Set("Accept", contenttype.ASUTF8)
 	r.Header.Set(contentType, contenttype.ASUTF8)
 	// Sign request
diff --git a/activityPubTools.go b/activityPubTools.go
index dd9b9fb..74c4303 100644
--- a/activityPubTools.go
+++ b/activityPubTools.go
@@ -43,7 +43,6 @@ func (a *goBlog) apRemoteFollow(w http.ResponseWriter, r *http.Request) {
 		webfinger := &webfingerType{}
 		err := requests.URL(fmt.Sprintf("https://%s/.well-known/webfinger?resource=acct:%s@%s", instance, user, instance)).
 			Client(a.httpClient).
-			UserAgent(appUserAgent).
 			Handle(func(resp *http.Response) error {
 				defer resp.Body.Close()
 				return json.NewDecoder(io.LimitReader(resp.Body, 1000*1000)).Decode(webfinger)
diff --git a/blogroll.go b/blogroll.go
index 0f53f18..098a2be 100644
--- a/blogroll.go
+++ b/blogroll.go
@@ -71,7 +71,7 @@ func (a *goBlog) getBlogrollOutlines(blog string) ([]*opml.Outline, error) {
 	if cache := a.db.loadOutlineCache(blog); cache != nil {
 		return cache, nil
 	}
-	rb := requests.URL(config.Opml).Client(a.httpClient).UserAgent(appUserAgent)
+	rb := requests.URL(config.Opml).Client(a.httpClient)
 	if config.AuthHeader != "" && config.AuthValue != "" {
 		rb.Header(config.AuthHeader, config.AuthValue)
 	}
diff --git a/geo.go b/geo.go
index c98e805..8e65792 100644
--- a/geo.go
+++ b/geo.go
@@ -47,7 +47,7 @@ func (a *goBlog) photonReverse(lat, lon float64, lang string) (*geojson.FeatureC
 	buf := bufferpool.Get()
 	defer bufferpool.Put(buf)
 	// Create request
-	rb := requests.URL("https://photon.komoot.io/reverse").Client(a.httpClient).UserAgent(appUserAgent).ToBytesBuffer(buf)
+	rb := requests.URL("https://photon.komoot.io/reverse").Client(a.httpClient).ToBytesBuffer(buf)
 	// Set parameters
 	rb.Param("lat", fmt.Sprintf("%v", lat)).Param("lon", fmt.Sprintf("%v", lon))
 	rb.Param("lang", lo.If(lang == "de" || lang == "fr" || lang == "it", lang).Else("en")) // Photon only supports en, de, fr, it
diff --git a/geoTiles.go b/geoTiles.go
index f16d2ab..1713cc2 100644
--- a/geoTiles.go
+++ b/geoTiles.go
@@ -21,7 +21,6 @@ func (a *goBlog) proxyTiles() http.HandlerFunc {
 		targetUrl = strings.ReplaceAll(targetUrl, "{x}", chi.URLParam(r, "x"))
 		targetUrl = strings.ReplaceAll(targetUrl, "{y}", chi.URLParam(r, "y"))
 		proxyRequest, _ := http.NewRequestWithContext(r.Context(), http.MethodGet, targetUrl, nil)
-		proxyRequest.Header.Set(userAgent, appUserAgent)
 		// Copy request headers
 		for _, k := range []string{
 			"Accept-Encoding",
diff --git a/httpClient.go b/httpClient.go
index 2664b54..a91e8ad 100644
--- a/httpClient.go
+++ b/httpClient.go
@@ -10,8 +10,25 @@ import (
 func newHttpClient() *http.Client {
 	return &http.Client{
 		Timeout: time.Minute,
-		Transport: gzhttp.Transport(&http.Transport{
-			DisableKeepAlives: true,
-		}),
+		Transport: newAddUserAgentTransport(
+			gzhttp.Transport(
+				&http.Transport{
+					DisableKeepAlives: true,
+				},
+			),
+		),
 	}
 }
+
+type addUserAgentTransport struct {
+	t http.RoundTripper
+}
+
+func (t *addUserAgentTransport) RoundTrip(r *http.Request) (*http.Response, error) {
+	r.Header.Set(userAgent, appUserAgent)
+	return t.t.RoundTrip(r)
+}
+
+func newAddUserAgentTransport(t http.RoundTripper) *addUserAgentTransport {
+	return &addUserAgentTransport{t}
+}
diff --git a/httpClient_test.go b/httpClient_test.go
index 3d1a6f3..159503e 100644
--- a/httpClient_test.go
+++ b/httpClient_test.go
@@ -8,6 +8,8 @@ import (
 	"sync"
 	"testing"
 
+	"github.com/carlmjohnson/requests"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -75,3 +77,20 @@ func Test_fakeHttpClient(t *testing.T) {
 	require.Equal(t, http.StatusNotFound, resp.StatusCode)
 	_ = resp.Body.Close()
 }
+
+func Test_addUserAgent(t *testing.T) {
+	ua := "ABC"
+
+	client := &http.Client{
+		Transport: newAddUserAgentTransport(&handlerRoundTripper{
+			handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				ua = r.Header.Get(userAgent)
+			}),
+		}),
+	}
+
+	err := requests.URL("http://example.com").UserAgent("WRONG").Client(client).Fetch(context.Background())
+	require.NoError(t, err)
+
+	assert.Equal(t, appUserAgent, ua)
+}
diff --git a/indexnow.go b/indexnow.go
index bd4d195..f102821 100644
--- a/indexnow.go
+++ b/indexnow.go
@@ -55,7 +55,6 @@ func (a *goBlog) indexNow(url string) {
 	}
 	err := requests.URL("https://api.indexnow.org/indexnow").
 		Client(a.httpClient).
-		UserAgent(appUserAgent).
 		Param("url", url).
 		Param("key", string(key)).
 		Fetch(context.Background())
diff --git a/ntfy.go b/ntfy.go
index 9eb93e6..5b367d3 100644
--- a/ntfy.go
+++ b/ntfy.go
@@ -25,7 +25,6 @@ func (a *goBlog) sendNtfy(cfg *configNtfy, msg string) error {
 	builder := requests.
 		URL(server + "/" + topic).
 		Client(a.httpClient).
-		UserAgent(appUserAgent).
 		Method(http.MethodPost).
 		BodyReader(strings.NewReader(msg))
 	if cfg.User != "" {
diff --git a/tts.go b/tts.go
index 19bca49..cd221e7 100644
--- a/tts.go
+++ b/tts.go
@@ -210,7 +210,6 @@ func (a *goBlog) createTTSAudio(lang, ssml string, w io.Writer) error {
 		URL("https://texttospeech.googleapis.com/v1beta1/text:synthesize").
 		Param("key", gctts.GoogleAPIKey).
 		Client(a.httpClient).
-		UserAgent(appUserAgent).
 		Method(http.MethodPost).
 		BodyJSON(body).
 		ToJSON(&response).
diff --git a/webmentionSending.go b/webmentionSending.go
index 1033042..9599ce0 100644
--- a/webmentionSending.go
+++ b/webmentionSending.go
@@ -77,7 +77,7 @@ func (a *goBlog) sendWebmentions(p *post) error {
 
 func (a *goBlog) sendWebmention(endpoint, source, target string) error {
 	// TODO: Pass all tests from https://webmention.rocks/
-	return requests.URL(endpoint).Client(a.httpClient).Method(http.MethodPost).UserAgent(appUserAgent).
+	return requests.URL(endpoint).Client(a.httpClient).Method(http.MethodPost).
 		BodyForm(url.Values{
 			"source": []string{source},
 			"target": []string{target},
@@ -94,7 +94,7 @@ func (a *goBlog) sendWebmention(endpoint, source, target string) error {
 func (a *goBlog) discoverEndpoint(urlStr string) string {
 	doRequest := func(method, urlStr string) string {
 		endpoint := ""
-		if err := requests.URL(urlStr).Client(a.httpClient).Method(method).UserAgent(appUserAgent).
+		if err := requests.URL(urlStr).Client(a.httpClient).Method(method).
 			AddValidator(func(r *http.Response) error {
 				if r.StatusCode < 200 || 300 <= r.StatusCode {
 					return fmt.Errorf("HTTP %d", r.StatusCode)
diff --git a/webmentionVerification.go b/webmentionVerification.go
index ab12420..0149936 100644
--- a/webmentionVerification.go
+++ b/webmentionVerification.go
@@ -89,7 +89,6 @@ func (a *goBlog) verifyMention(m *mention) error {
 		}
 		defer sourceResp.Body.Close()
 	} else {
-		sourceReq.Header.Set(userAgent, appUserAgent)
 		sourceResp, err = a.httpClient.Do(sourceReq)
 		if err != nil {
 			return err