diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd054dc..16adff1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,7 +29,7 @@ set(ENABLE_TESTING OFF)
 FetchContent_Declare(
     graph-prototype
     GIT_REPOSITORY https://github.com/fair-acc/graph-prototype.git
-    GIT_TAG 3cb5c2aff7046bc3760ccd8f8b701cbde361ecfd # main as of 2024-04-05
+    GIT_TAG c96c8ec1898a508f0e522ad91e50080c867659bd # main as of 2024-04-23
 )
 
 FetchContent_Declare(
diff --git a/blocklib/picoscope/Picoscope.hpp b/blocklib/picoscope/Picoscope.hpp
index 1fb2557..5473066 100644
--- a/blocklib/picoscope/Picoscope.hpp
+++ b/blocklib/picoscope/Picoscope.hpp
@@ -296,7 +296,7 @@ struct Picoscope : public gr::Block<TPSImpl, gr::BlockingIO<true>, gr::Supported
 
         if (const auto errors_available = ps_state.errors.reader.available(); errors_available > 0) {
             auto errors = ps_state.errors.reader.get(errors_available);
-            std::ignore = ps_state.errors.reader.consume(errors_available);
+            std::ignore = errors.consume(errors.size());
             return { 0, 0, ERROR };
         }
 
diff --git a/blocklib/timing/src/test-timing.cpp b/blocklib/timing/src/test-timing.cpp
index 6331b22..1c0ad84 100644
--- a/blocklib/timing/src/test-timing.cpp
+++ b/blocklib/timing/src/test-timing.cpp
@@ -213,7 +213,8 @@ void drawSnoopedEventTableRow(const Timing::Event &evt, Timing &timing) {
 void showTimingEventTable(Timing &timing) {
     static gr::BufferReader auto event_reader = timing.snooped.new_reader();
     if (ImGui::Button("clear")) {
-        std::ignore = event_reader.consume(event_reader.available());
+        auto ignored = event_reader.get();
+        std::ignored = ignored.consume(ignored.size());
     }
     ImGui::SameLine(); ImGui::Dummy({50,5});ImGui::SameLine();
     auto [id_filter, mask] = TimingGroupFilterDropdown();
@@ -656,7 +657,7 @@ class TimePlot {
                 events.pushBack({eventtime, static_cast<double>(event.eventNo)});
             }
         }
-        std::ignore = snoopReader.consume(newEvents.size()); // consume processed events
+        std::ignore = newEvents.consume(newEvents.size()); // consume processed events
     }
 
     void display(Timing &timing) const {