diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9dd4d02..0cae0bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(blt-gp VERSION 0.0.117)
+project(blt-gp VERSION 0.0.118)
 
 include(CTest)
 
diff --git a/include/blt/gp/transformers.h b/include/blt/gp/transformers.h
index e418e73..60042cb 100644
--- a/include/blt/gp/transformers.h
+++ b/include/blt/gp/transformers.h
@@ -34,10 +34,6 @@ namespace blt::gp
     
     blt::ptrdiff_t find_endpoint(blt::gp::gp_program& program, const std::vector<blt::gp::op_container_t>& container, blt::ptrdiff_t start);
     
-    void transfer_forward(blt::gp::stack_allocator& from, blt::gp::stack_allocator& to, detail::op_iter begin, detail::op_iter end);
-    
-    void transfer_backward(blt::gp::stack_allocator& from, blt::gp::stack_allocator& to, detail::op_iter begin, detail::op_iter end);
-    
     class crossover_t
     {
         public:
diff --git a/lib/blt b/lib/blt
index 8535480..f993869 160000
--- a/lib/blt
+++ b/lib/blt
@@ -1 +1 @@
-Subproject commit 8535480ad57553e592640b98e9e005d7a4d27501
+Subproject commit f9938691ecb13b7b6acb2402235015bef9d58982
diff --git a/src/transformers.cpp b/src/transformers.cpp
index 3b8a96b..d923929 100644
--- a/src/transformers.cpp
+++ b/src/transformers.cpp
@@ -304,23 +304,4 @@ namespace blt::gp
         
         return index;
     }
-    
-    void transfer_backward(stack_allocator& from, stack_allocator& to, detail::op_iter begin, detail::op_iter end)
-    {
-        for (auto it = begin; it != end; it--)
-        {
-            if (it->is_value)
-                from.transfer_bytes(to, it->type_size);
-        }
-    }
-    
-    void transfer_forward(stack_allocator& from, stack_allocator& to, detail::op_iter begin, detail::op_iter end)
-    {
-        // now copy back into the respective children
-        for (auto it = begin; it != end; it++)
-        {
-            if (it->is_value)
-                from.transfer_bytes(to, it->type_size);
-        }
-    }
 }
\ No newline at end of file