diff --git a/Project.toml b/Project.toml
index 3988b027..1b658198 100644
--- a/Project.toml
+++ b/Project.toml
@@ -48,7 +48,7 @@ Dates = "1"
 DifferentiationInterface = "0.5, 0.6"
 DispatchDoctor = "^0.4.17"
 Distributed = "<0.0.1, 1"
-DynamicExpressions = "1.6.0"
+DynamicExpressions = "~1.8"
 DynamicQuantities = "1"
 Enzyme = "0.12, 0.13"
 JSON3 = "1"
diff --git a/src/ComposableExpression.jl b/src/ComposableExpression.jl
index f47ab9a5..0247cf10 100644
--- a/src/ComposableExpression.jl
+++ b/src/ComposableExpression.jl
@@ -112,6 +112,15 @@ end
 function CO.count_constants_for_optimization(ex::AbstractComposableExpression)
     return CO.count_constants_for_optimization(convert(Expression, ex))
 end
+function DE.allocate_container(
+    prototype::ComposableExpression, n::Union{Nothing,Integer}=nothing
+)
+    return (; tree=DE.allocate_container(get_contents(prototype), n))
+end
+function DE.copy_into!(dest::NamedTuple, src::ComposableExpression)
+    new_tree = DE.copy_into!(dest.tree, get_contents(src))
+    return DE.with_contents(src, new_tree)
+end
 
 @implements(
     ExpressionInterface{all_ei_methods_except(())}, ComposableExpression, [Arguments()]
diff --git a/src/Mutate.jl b/src/Mutate.jl
index e3ab8993..cc343351 100644
--- a/src/Mutate.jl
+++ b/src/Mutate.jl
@@ -2,11 +2,13 @@ module MutateModule
 
 using DynamicExpressions:
     AbstractExpression,
+    copy_into!,
     get_tree,
     preserve_sharing,
     count_scalar_constants,
     simplify_tree!,
-    combine_operators
+    combine_operators,
+    allocate_container
 using ..CoreModule:
     AbstractOptions,
     AbstractMutationWeights,
@@ -187,13 +189,14 @@ function next_generation(
     successful_mutation = false
     attempts = 0
     max_attempts = 10
+    node_storage = allocate_container(member.tree)
 
     #############################################
     # Mutations
     #############################################
     local tree
     while (!successful_mutation) && attempts < max_attempts
-        tree = copy(member.tree)
+        tree = copy_into!(node_storage, member.tree)
 
         mutation_result = _dispatch_mutations!(
             tree,
@@ -238,7 +241,7 @@ function next_generation(
         mutation_accepted = false
         return (
             PopMember(
-                copy(member.tree),
+                copy_into!(node_storage, member.tree),
                 beforeScore,
                 beforeLoss,
                 options,
@@ -267,7 +270,7 @@ function next_generation(
         mutation_accepted = false
         return (
             PopMember(
-                copy(member.tree),
+                copy_into!(node_storage, member.tree),
                 beforeScore,
                 beforeLoss,
                 options,
@@ -310,7 +313,7 @@ function next_generation(
         mutation_accepted = false
         return (
             PopMember(
-                copy(member.tree),
+                copy_into!(node_storage, member.tree),
                 beforeScore,
                 beforeLoss,
                 options,