diff --git a/cmake/Dependencies.cmake b/cmake/Dependencies.cmake
index 753d5a9..3fc8236 100644
--- a/cmake/Dependencies.cmake
+++ b/cmake/Dependencies.cmake
@@ -3,14 +3,15 @@ include(FetchContent)
 FetchContent_Declare(
         gnuradio4
         GIT_REPOSITORY https://github.com/fair-acc/gnuradio4.git
-        GIT_TAG c51a5d5253bdd2ce7bbc785970b7ec4bbe2878dc # main as of 2024-06-14
+        #GIT_TAG 6d85d74a09194f30e538f1a87e586944a6aae86d # main as of 2024-09-16
+        GIT_TAG frank/upgrade-fmt-11.0.2
         SYSTEM
 )
 
 FetchContent_Declare(
         opencmw-cpp
         GIT_REPOSITORY https://github.com/fair-acc/opencmw-cpp.git
-        GIT_TAG 0fb3758c3ffe7707aa5e0bd2ad25f9e8fb19f79d # main as of 2024-04-26
+        GIT_TAG frank/upgrade-fmt-11.0.2
         SYSTEM
 )
 
diff --git a/src/service/gnuradio/GnuRadioWorker.hpp b/src/service/gnuradio/GnuRadioWorker.hpp
index 2b2eb97..c8849e1 100644
--- a/src/service/gnuradio/GnuRadioWorker.hpp
+++ b/src/service/gnuradio/GnuRadioWorker.hpp
@@ -314,7 +314,7 @@ class GnuRadioAcquisitionWorker : public Worker<serviceName, TimeDomainContext,
                         }
                         _updateSignalEntriesCallback(std::move(entries));
                     }
-                    auto sched          = std::make_unique<scheduler::Simple<scheduler::multiThreaded>>(std::move(*pendingFlowGraph));
+                    auto sched          = std::make_unique<scheduler::Simple<scheduler::ExecutionPolicy::multiThreaded>>(std::move(*pendingFlowGraph));
                     toScheduler         = std::make_unique<MsgPortOut>();
                     fromScheduler       = std::make_unique<MsgPortIn>();
                     std::ignore         = toScheduler->connect(sched->msgIn);
@@ -417,8 +417,8 @@ class GnuRadioAcquisitionWorker : public Worker<serviceName, TimeDomainContext,
 
         auto pollerIt = pollers.find(key);
         if (pollerIt == pollers.end()) {
-            auto matcher = [trigger_name = context.triggerNameFilter](const gr::Tag& tag) {
-                using enum gr::basic::TriggerMatchResult;
+            auto matcher = [trigger_name = context.triggerNameFilter](std::string_view, const gr::Tag& tag, const gr::property_map&) {
+                using enum gr::trigger::MatchResult;
                 const auto v = tag.get(gr::tag::TRIGGER_NAME);
                 if (trigger_name.empty()) {
                     return v ? Matching : Ignore;
diff --git a/src/service/main.cpp b/src/service/main.cpp
index 2dcc05e..b312a48 100644
--- a/src/service/main.cpp
+++ b/src/service/main.cpp
@@ -16,7 +16,7 @@
 // TODO instead of including and registering blocks manually here, rely on the plugin system
 #include <gnuradio-4.0/basic/Selector.hpp>
 #include <gnuradio-4.0/basic/common_blocks.hpp>
-#include <gnuradio-4.0/basic/function_generator.h>
+#include <gnuradio-4.0/basic/function_generator.hpp>
 
 #ifndef __EMSCRIPTEN__
 #include <Picoscope4000a.hpp>
diff --git a/src/ui/App.hpp b/src/ui/App.hpp
index b6d2dac..d093632 100644
--- a/src/ui/App.hpp
+++ b/src/ui/App.hpp
@@ -11,6 +11,7 @@
 #include "FlowgraphItem.hpp"
 #include "OpenDashboardPage.hpp"
 
+#include <gnuradio-4.0/CircularBuffer.hpp>
 #include <gnuradio-4.0/Message.hpp>
 #include <gnuradio-4.0/Scheduler.hpp>
 
@@ -117,7 +118,8 @@ class App {
             std::string_view uniqueName() const override { return _scheduler.unique_name; }
 
             void sendMessage(const gr::Message& msg) final {
-                _toScheduler.streamWriter().publish([&](auto& output) { output[0] = msg; }, 1);
+                auto output = _toScheduler.streamWriter().reserve<gr::SpanReleasePolicy::ProcessAll>(1UZ);
+                output[0]   = msg;
             }
 
             void handleMessages(FlowGraph& fg) final {
@@ -200,7 +202,7 @@ class App {
 
     template<typename Graph>
     void assignScheduler(Graph&& graph) {
-        using Scheduler = gr::scheduler::Simple<gr::scheduler::multiThreaded>;
+        using Scheduler = gr::scheduler::Simple<gr::scheduler::ExecutionPolicy::multiThreaded>;
 
         _scheduler.emplace<Scheduler>(std::forward<Graph>(graph), schedulerThreadPool);
     }
diff --git a/src/ui/Flowgraph.cpp b/src/ui/Flowgraph.cpp
index 739779c..d9b65d7 100644
--- a/src/ui/Flowgraph.cpp
+++ b/src/ui/Flowgraph.cpp
@@ -280,10 +280,10 @@ void Block::setCurrentInstantiation(const std::string& newInstantiation) {
     m_outputs.reserve(instantiation.outputs.size());
     m_inputs.reserve(instantiation.inputs.size());
     for (auto& o : instantiation.outputs) {
-        m_outputs.push_back({this, o.type, o.dataset, Port::Direction::Output});
+        m_outputs.push_back({this, o.name, o.type, o.dataset, Port::Direction::Output});
     }
     for (auto& o : instantiation.inputs) {
-        m_inputs.push_back({this, o.type, o.dataset, Port::Direction::Input});
+        m_inputs.push_back({this, o.name, o.type, o.dataset, Port::Direction::Input});
     }
 }
 
@@ -337,22 +337,55 @@ void FlowGraph::parse(const std::string& str) {
         return it == m_blocks.end() ? nullptr : it->get();
     };
 
+    auto findPort = [&](const auto& portDefinition, auto& ports) {
+        return std::visit(gr::meta::overloaded(
+                              [&](const gr::PortDefinition::IndexBased& definition) {
+                                  if (definition.topLevel >= ports.size()) {
+                                      fmt::println(std::cerr, "Cannot connect, index {} is not valid (only {} ports available)", definition.topLevel, definition.topLevel);
+                                  }
+                                  // TODO check subIndex once we support port collections
+                                  return std::pair{ports.begin() + definition.topLevel, definition.subIndex};
+                              },
+                              [&](const gr::PortDefinition::StringBased& definition) {
+                                  auto       split    = std::string_view(definition.name) | std::ranges::views::split('#');
+                                  const auto segs     = std::vector(split.begin(), split.end());
+                                  const auto name     = std::string_view(segs[0].data(), segs[0].size());
+                                  const auto subIndex = [&] {
+                                      if (segs.size() < 2) {
+                                          return 0UZ;
+                                      }
+                                      auto index          = 0UZ;
+                                      const auto& [_, ec] = std::from_chars(segs[1].begin(), segs[1].end(), index);
+                                      if (ec != std::errc{}) {
+                                          throw std::runtime_error(fmt::format("Invalid subindex in '{}'", definition.name));
+                                      }
+                                      return index;
+                                  }();
+                                  const auto it = std::ranges::find_if(ports, [&name](const auto& port) { return port.name == name; });
+                                  if (it == ports.end()) {
+                                      fmt::println(std::cerr, "Cannot connect, no port with name '{}'", name);
+                                  }
+
+                                  // TODO check subIndex once we support port collections
+
+                                  return std::pair{it, subIndex};
+                              }),
+            portDefinition.definition);
+    };
+
     graph.forEachEdge([&](const auto& edge) {
         auto srcBlock = findBlock(edge._sourceBlock->uniqueName());
         assert(srcBlock);
-        const auto sourcePort = edge._sourcePortDefinition.topLevel;
-        auto       dstBlock   = findBlock(edge._destinationBlock->uniqueName());
+        // TODO do not ignore subindexes
+        const auto& [srcPort, _] = findPort(edge.sourcePortDefinition(), srcBlock->m_outputs);
+        auto dstBlock            = findBlock(edge._destinationBlock->uniqueName());
         assert(dstBlock);
-        const auto destinationPort = edge._destinationPortDefinition.topLevel;
-        // TODO support port collections
+        const auto& [dstPort, _] = findPort(edge.destinationPortDefinition(), dstBlock->m_inputs);
 
-        if (sourcePort >= srcBlock->m_outputs.size()) {
-            fmt::print("ERROR: Cannot connect, no output port with index {} in {}, have only {} ports\n", sourcePort, srcBlock->m_uniqueName, srcBlock->m_outputs.size());
-        } else if (destinationPort >= dstBlock->m_inputs.size()) {
-            fmt::print("ERROR: Cannot connect, no input port with index {} in {}, have only {} ports\n", destinationPort, dstBlock->m_uniqueName, dstBlock->m_inputs.size());
-        } else {
-            connect(&srcBlock->m_outputs[sourcePort], &dstBlock->m_inputs[destinationPort]);
+        if (srcPort == srcBlock->m_outputs.end() || dstPort == dstBlock->m_inputs.end()) {
+            return;
         }
+        connect(&*srcPort, &*dstPort);
     });
 
     m_graphChanged = true;
diff --git a/src/ui/Flowgraph.hpp b/src/ui/Flowgraph.hpp
index 069bbd9..e269dc0 100644
--- a/src/ui/Flowgraph.hpp
+++ b/src/ui/Flowgraph.hpp
@@ -263,6 +263,7 @@ class Block {
         };
 
         Block*            owningUiBlock;
+        const std::string name;
         const std::string rawPortType;
         bool              isDataset;
         const Direction   portDirection;
diff --git a/src/ui/cmake/Dependencies.cmake b/src/ui/cmake/Dependencies.cmake
index 159e922..7678f40 100644
--- a/src/ui/cmake/Dependencies.cmake
+++ b/src/ui/cmake/Dependencies.cmake
@@ -47,14 +47,14 @@ FetchContent_Declare( # needed to load images in ImGui
 FetchContent_Declare(
     opencmw-cpp
     GIT_REPOSITORY https://github.com/fair-acc/opencmw-cpp.git
-    GIT_TAG 0fb3758c3ffe7707aa5e0bd2ad25f9e8fb19f79d# main as of 2024-04-26
+    GIT_TAG frank/upgrade-fmt-11.0.2
     SYSTEM
 )
 
 FetchContent_Declare(
     gnuradio4
     GIT_REPOSITORY https://github.com/fair-acc/gnuradio4.git
-    GIT_TAG c51a5d5253bdd2ce7bbc785970b7ec4bbe2878dc # main as of 2024-06-14
+    GIT_TAG frank/upgrade-fmt-11.0.2
     SYSTEM
 )