diff --git a/hecl/CMakeLists.txt b/hecl/CMakeLists.txt
index 22370cb9c..f1efb5c96 100644
--- a/hecl/CMakeLists.txt
+++ b/hecl/CMakeLists.txt
@@ -5,10 +5,6 @@ if(MSVC)
   # Shaddup MSVC
   add_definitions(-DUNICODE=1 -D_UNICODE=1 -D_CRT_SECURE_NO_WARNINGS=1 /wd4267 /wd4244)
 else()
-  if (CMAKE_COMPILER_IS_GNUCXX)
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fpermissive")
-    message(WARNING "GCC needs -fpermissive for nested type redeclarations; expect lotsa warnings!!")
-  endif()
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wno-multichar -fno-exceptions")
 endif()
 endif()
diff --git a/hecl/extern/athena b/hecl/extern/athena
index d2fb800b9..617c12167 160000
--- a/hecl/extern/athena
+++ b/hecl/extern/athena
@@ -1 +1 @@
-Subproject commit d2fb800b926c9d4ef76e54242c54f3fe369f7c3d
+Subproject commit 617c1216750ad6da957088a4c8f9092dc508a463
diff --git a/hecl/extern/boo b/hecl/extern/boo
index 5afdb62a3..f76caba01 160000
--- a/hecl/extern/boo
+++ b/hecl/extern/boo
@@ -1 +1 @@
-Subproject commit 5afdb62a392eaf8ae41e09b9dd37b7922abd03b5
+Subproject commit f76caba013e1a653a3ef375911949c056c054c8e
diff --git a/hecl/include/hecl/ClientProcess.hpp b/hecl/include/hecl/ClientProcess.hpp
index f3b0097a7..a95df203a 100644
--- a/hecl/include/hecl/ClientProcess.hpp
+++ b/hecl/include/hecl/ClientProcess.hpp
@@ -66,6 +66,7 @@ public:
 private:
     std::list<std::unique_ptr<Transaction>> m_pendingQueue;
     std::list<std::unique_ptr<Transaction>> m_completedQueue;
+    int m_inProgress = 0;
     bool m_running = true;
 
     struct Worker
diff --git a/hecl/lib/ClientProcess.cpp b/hecl/lib/ClientProcess.cpp
index 4415ab1c2..318ae650b 100644
--- a/hecl/lib/ClientProcess.cpp
+++ b/hecl/lib/ClientProcess.cpp
@@ -71,11 +71,13 @@ void ClientProcess::Worker::proc()
         while (m_proc.m_pendingQueue.size())
         {
             std::unique_ptr<Transaction> trans = std::move(m_proc.m_pendingQueue.front());
+            ++m_proc.m_inProgress;
+            m_proc.m_pendingQueue.pop_front();
             lk.unlock();
             trans->run(m_blendTok);
             lk.lock();
             m_proc.m_completedQueue.push_back(std::move(trans));
-            m_proc.m_pendingQueue.pop_front();
+            --m_proc.m_inProgress;
         }
         m_proc.m_waitCv.notify_one();
         if (!m_proc.m_running)
@@ -158,7 +160,7 @@ void ClientProcess::swapCompletedQueue(std::list<std::unique_ptr<Transaction>>&
 void ClientProcess::waitUntilComplete()
 {
     std::unique_lock<std::mutex> lk(m_mutex);
-    while (m_pendingQueue.size())
+    while (m_pendingQueue.size() || m_inProgress)
         m_waitCv.wait(lk);
 }