diff --git a/gennghttpxfun.py b/gennghttpxfun.py
index b7c31d87..debaa044 100755
--- a/gennghttpxfun.py
+++ b/gennghttpxfun.py
@@ -180,6 +180,7 @@ OPTIONS = [
     "bpf-program-file",
     "no-bpf",
     "http2-altsvc",
+    "frontend-http3-read-timeout",
 ]
 
 LOGVARS = [
diff --git a/src/shrpx.cc b/src/shrpx.cc
index be8135be..e19f0aad 100644
--- a/src/shrpx.cc
+++ b/src/shrpx.cc
@@ -1590,6 +1590,9 @@ void fill_default_config(Config *config) {
       // Read timeout for HTTP2 upstream connection
       timeoutconf.http2_read = 3_min;
 
+      // Read timeout for HTTP3 upstream connection
+      timeoutconf.http3_read = 3_min;
+
       // Read timeout for non-HTTP2 upstream connection
       timeoutconf.read = 1_min;
 
@@ -2073,6 +2076,10 @@ Timeout:
               Specify read timeout for HTTP/2 frontend connection.
               Default: )"
       << util::duration_str(config->conn.upstream.timeout.http2_read) << R"(
+  --frontend-http3-read-timeout=<DURATION>
+              Specify read timeout for HTTP/3 frontend connection.
+              Default: )"
+      << util::duration_str(config->conn.upstream.timeout.http3_read) << R"(
   --frontend-read-timeout=<DURATION>
               Specify read timeout for HTTP/1.1 frontend connection.
               Default: )"
@@ -3589,6 +3596,8 @@ int main(int argc, char **argv) {
         {SHRPX_OPT_BPF_PROGRAM_FILE.c_str(), required_argument, &flag, 169},
         {SHRPX_OPT_NO_BPF.c_str(), no_argument, &flag, 170},
         {SHRPX_OPT_HTTP2_ALTSVC.c_str(), required_argument, &flag, 171},
+        {SHRPX_OPT_FRONTEND_HTTP3_READ_TIMEOUT.c_str(), required_argument,
+         &flag, 172},
         {nullptr, 0, nullptr, 0}};
 
     int option_index = 0;
@@ -4404,6 +4413,11 @@ int main(int argc, char **argv) {
         // --http2-altsvc
         cmdcfgs.emplace_back(SHRPX_OPT_HTTP2_ALTSVC, StringRef{optarg});
         break;
+      case 172:
+        // --frontend-http3-read-timeout
+        cmdcfgs.emplace_back(SHRPX_OPT_FRONTEND_HTTP3_READ_TIMEOUT,
+                             StringRef{optarg});
+        break;
       default:
         break;
       }
diff --git a/src/shrpx_client_handler.cc b/src/shrpx_client_handler.cc
index d58c9a5f..c9327397 100644
--- a/src/shrpx_client_handler.cc
+++ b/src/shrpx_client_handler.cc
@@ -519,6 +519,10 @@ void ClientHandler::setup_http3_upstream(
   upstream_ = std::move(upstream);
   alpn_ = StringRef::from_lit("h3");
   write_ = &ClientHandler::write_quic;
+
+  auto config = get_config();
+
+  reset_upstream_read_timeout(config->conn.upstream.timeout.http3_read);
 }
 #endif // ENABLE_HTTP3
 
diff --git a/src/shrpx_config.cc b/src/shrpx_config.cc
index 3c0a63dc..59643183 100644
--- a/src/shrpx_config.cc
+++ b/src/shrpx_config.cc
@@ -2393,6 +2393,9 @@ int option_lookup_token(const char *name, size_t namelen) {
       if (util::strieq_l("frontend-http2-read-timeou", name, 26)) {
         return SHRPX_OPTID_FRONTEND_HTTP2_READ_TIMEOUT;
       }
+      if (util::strieq_l("frontend-http3-read-timeou", name, 26)) {
+        return SHRPX_OPTID_FRONTEND_HTTP3_READ_TIMEOUT;
+      }
       if (util::strieq_l("frontend-keep-alive-timeou", name, 26)) {
         return SHRPX_OPTID_FRONTEND_KEEP_ALIVE_TIMEOUT;
       }
@@ -3873,6 +3876,9 @@ int parse_config(Config *config, int optid, const StringRef &opt,
 
     return 0;
   }
+  case SHRPX_OPTID_FRONTEND_HTTP3_READ_TIMEOUT:
+    return parse_duration(&config->conn.upstream.timeout.http3_read, opt,
+                          optarg);
   case SHRPX_OPTID_CONF:
     LOG(WARN) << "conf: ignored";
 
diff --git a/src/shrpx_config.h b/src/shrpx_config.h
index 4b1bd8fd..facc3acf 100644
--- a/src/shrpx_config.h
+++ b/src/shrpx_config.h
@@ -367,6 +367,8 @@ constexpr auto SHRPX_OPT_BPF_PROGRAM_FILE =
     StringRef::from_lit("bpf-program-file");
 constexpr auto SHRPX_OPT_NO_BPF = StringRef::from_lit("no-bpf");
 constexpr auto SHRPX_OPT_HTTP2_ALTSVC = StringRef::from_lit("http2-altsvc");
+constexpr auto SHRPX_OPT_FRONTEND_HTTP3_READ_TIMEOUT =
+    StringRef::from_lit("frontend-http3-read-timeout");
 
 constexpr size_t SHRPX_OBFUSCATED_NODE_LENGTH = 8;
 
@@ -955,6 +957,7 @@ struct ConnectionConfig {
   struct {
     struct {
       ev_tstamp http2_read;
+      ev_tstamp http3_read;
       ev_tstamp read;
       ev_tstamp write;
       ev_tstamp idle_read;
@@ -1160,6 +1163,7 @@ enum {
   SHRPX_OPTID_FRONTEND_HTTP2_SETTINGS_TIMEOUT,
   SHRPX_OPTID_FRONTEND_HTTP2_WINDOW_BITS,
   SHRPX_OPTID_FRONTEND_HTTP2_WINDOW_SIZE,
+  SHRPX_OPTID_FRONTEND_HTTP3_READ_TIMEOUT,
   SHRPX_OPTID_FRONTEND_KEEP_ALIVE_TIMEOUT,
   SHRPX_OPTID_FRONTEND_MAX_REQUESTS,
   SHRPX_OPTID_FRONTEND_NO_TLS,