diff --git a/src/ice_transport.cpp b/src/ice_transport.cpp
index 34cf68c898004ab0f66429846c269bf7e6c58a5f..e74975638ea589341b1d45d4d1440888725fc2ca 100644
--- a/src/ice_transport.cpp
+++ b/src/ice_transport.cpp
@@ -749,7 +749,7 @@ IceTransport::Impl::onComplete(pj_ice_strans*, pj_ice_strans_op op, pj_status_t
         if (done) {
             // Dump of connection pairs
             if (logger_)
-                logger_->debug("[ice:{}] {:s} connection pairs ([comp id] local [type] <-> remote [type]):\n{:s}",
+                logger_->debug("[ice:{}] {:s} connection pairs ([comp id] local [type] ↔ remote [type]):\n{:s}",
                      fmt::ptr(this),
                      (config_.protocol == PJ_ICE_TP_TCP ? "TCP" : "UDP"),
                      link());
@@ -774,7 +774,7 @@ IceTransport::Impl::link() const
         if (laddr and laddr.getPort() != 0 and raddr and raddr.getPort() != 0) {
             out << " [" << comp << "] " << laddr.toString(true, true) << " ["
                 << getCandidateType(getSelectedCandidate(absIdx, false)) << "] "
-                << " <-> " << raddr.toString(true, true) << " ["
+                << " ↔ " << raddr.toString(true, true) << " ["
                 << getCandidateType(getSelectedCandidate(absIdx, true)) << "] " << '\n';
         } else {
             out << " [" << comp << "] disabled\n";
diff --git a/src/security/tls_session.cpp b/src/security/tls_session.cpp
index 4e6952e439bdb873d1637c36e203b1d6ecfa9231..96f8857401dd9c575d301c578e4dea57e7a0f3e7 100644
--- a/src/security/tls_session.cpp
+++ b/src/security/tls_session.cpp
@@ -236,7 +236,7 @@ public:
     std::atomic<TlsSessionState> newState_ {TlsSessionState::NONE};
     std::atomic<int> maxPayload_ {-1};
 
-    // IO GnuTLS <-> ICE
+    // IO GnuTLS ↔ ICE
     std::mutex rxMutex_ {};
     std::condition_variable rxCv_ {};
     std::list<std::vector<ValueType>> rxQueue_ {};
diff --git a/src/upnp/protocol/pupnp/pupnp.cpp b/src/upnp/protocol/pupnp/pupnp.cpp
index b49a43a6bdf38ae2d550a745e7b5c92622ec3f15..68eafa60ad0a9347433814d4fc17035877522cd1 100644
--- a/src/upnp/protocol/pupnp/pupnp.cpp
+++ b/src/upnp/protocol/pupnp/pupnp.cpp
@@ -99,7 +99,7 @@ PUPnP::PUPnP(const std::shared_ptr<asio::io_context>& ctx, const std::shared_ptr
  : UPnPProtocol(logger), ioContext(ctx), searchForIgdTimer_(*ctx)
  , ongoingOpsThreadPool_(1, 64)
 {
-    if (logger_) logger_->debug("PUPnP: Creating instance [{}] ...", fmt::ptr(this));
+    if (logger_) logger_->debug("PUPnP: Creating instance [{}]…", fmt::ptr(this));
 }
 
 PUPnP::~PUPnP()