diff --git a/interface/coroutine/net.h b/interface/coroutine/net.h
index 17b70a8..3c44827 100644
--- a/interface/coroutine/net.h
+++ b/interface/coroutine/net.h
@@ -344,7 +344,7 @@ void poll_net_tasks(uint64_t nano) noexcept(false);
  * @ingroup Network
  */
 uint32_t get_address(const addrinfo& hint, //
-                     gsl::czstring<> host, gsl::czstring<> serv,
+                     gsl::czstring host, gsl::czstring serv,
                      gsl::span<sockaddr_in> output) noexcept;
 
 /**
@@ -361,7 +361,7 @@ uint32_t get_address(const addrinfo& hint, //
  * @ingroup Network
  */
 uint32_t get_address(const addrinfo& hint, //
-                     gsl::czstring<> host, gsl::czstring<> serv,
+                     gsl::czstring host, gsl::czstring serv,
                      gsl::span<sockaddr_in6> output) noexcept;
 
 /**
@@ -377,7 +377,7 @@ uint32_t get_address(const addrinfo& hint, //
  * @ingroup Network
  */
 uint32_t get_name(const sockaddr_in& addr, //
-                  gsl::zstring<NI_MAXHOST> name, gsl::zstring<NI_MAXSERV> serv,
+                  gsl::basic_zstring<char, NI_MAXHOST> name, gsl::basic_zstring<char, NI_MAXSERV> serv,
                   int32_t flags = NI_NUMERICHOST | NI_NUMERICSERV) noexcept;
 
 /**
@@ -392,7 +392,7 @@ uint32_t get_name(const sockaddr_in& addr, //
  * @ingroup Network
  */
 uint32_t get_name(const sockaddr_in6& addr, //
-                  gsl::zstring<NI_MAXHOST> name, gsl::zstring<NI_MAXSERV> serv,
+                  gsl::basic_zstring<char, NI_MAXHOST> name, gsl::basic_zstring<char, NI_MAXSERV> serv,
                   int32_t flags = NI_NUMERICHOST | NI_NUMERICSERV) noexcept;
 
 } // namespace coro
diff --git a/modules/net/resolver.cpp b/modules/net/resolver.cpp
index 21a9800..5328939 100644
--- a/modules/net/resolver.cpp
+++ b/modules/net/resolver.cpp
@@ -9,7 +9,7 @@ namespace coro {
 
 GSL_SUPPRESS(type .1)
 uint32_t get_name(const sockaddr_in& addr, //
-                  gsl::zstring<NI_MAXHOST> name, gsl::zstring<NI_MAXSERV> serv,
+                  gsl::basic_zstring<char, NI_MAXHOST> name, gsl::basic_zstring<char, NI_MAXSERV> serv,
                   int32_t flags) noexcept {
     const auto* ptr = reinterpret_cast<const sockaddr*>(addressof(addr));
     return ::getnameinfo(ptr, sizeof(sockaddr_in),                 //
@@ -20,7 +20,7 @@ uint32_t get_name(const sockaddr_in& addr, //
 
 GSL_SUPPRESS(type .1)
 uint32_t get_name(const sockaddr_in6& addr, //
-                  gsl::zstring<NI_MAXHOST> name, gsl::zstring<NI_MAXSERV> serv,
+                  gsl::basic_zstring<char, NI_MAXHOST> name, gsl::basic_zstring<char, NI_MAXSERV> serv,
                   int32_t flags) noexcept {
     const auto* ptr = reinterpret_cast<const sockaddr*>(addressof(addr));
     return ::getnameinfo(ptr, sizeof(sockaddr_in6),                //
@@ -58,7 +58,7 @@ auto get_address(addrinfo* list, sockaddr_in6 addr) noexcept
 }
 
 uint32_t get_address(const addrinfo& hint, //
-                     gsl::czstring<> host, gsl::czstring<> serv,
+                     gsl::czstring host, gsl::czstring serv,
                      gsl::span<sockaddr_in> output) noexcept {
     addrinfo* list = nullptr;
     if (const auto ec = ::getaddrinfo(host, serv, //
@@ -74,7 +74,7 @@ uint32_t get_address(const addrinfo& hint, //
 }
 
 uint32_t get_address(const addrinfo& hint, //
-                     gsl::czstring<> host, gsl::czstring<> serv,
+                     gsl::czstring host, gsl::czstring serv,
                      gsl::span<sockaddr_in6> output) noexcept {
     addrinfo* list = nullptr;
     if (const auto ec = ::getaddrinfo(host, serv, //