diff --git a/Project.toml b/Project.toml
index c13cd4e..517d91c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "KroneckerArrays"
 uuid = "05d0b138-81bc-4ff7-84be-08becefb1ccc"
 authors = ["ITensor developers <support@itensor.org> and contributors"]
-version = "0.1.28"
+version = "0.1.29"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
@@ -33,7 +33,7 @@ DiagonalArrays = "0.3.11"
 FillArrays = "1.13"
 GPUArraysCore = "0.2"
 LinearAlgebra = "1.10"
-MapBroadcast = "0.1.9"
+MapBroadcast = "0.1.10"
 MatrixAlgebraKit = "0.2"
 TensorAlgebra = "0.3.10"
 TensorProducts = "0.1.7"
diff --git a/src/KroneckerArrays.jl b/src/KroneckerArrays.jl
index 28bdf3e..4552a2f 100644
--- a/src/KroneckerArrays.jl
+++ b/src/KroneckerArrays.jl
@@ -2,7 +2,6 @@ module KroneckerArrays
 
 export ⊗, ×
 
-include("linearcombination.jl")
 include("cartesianproduct.jl")
 include("kroneckerarray.jl")
 include("linearalgebra.jl")
diff --git a/src/fillarrays/kroneckerarray.jl b/src/fillarrays/kroneckerarray.jl
index 0faeb48..90b3e14 100644
--- a/src/fillarrays/kroneckerarray.jl
+++ b/src/fillarrays/kroneckerarray.jl
@@ -123,23 +123,27 @@ function Base.similar(bc::Broadcasted{EyeStyle}, elt::Type)
 end
 
 # TODO: Define in terms of `_copyto!!` that is called on each argument.
-function Base.copyto!(dest::EyeKronecker, a::Sum{<:KroneckerStyle{<:Any,EyeStyle()}})
+function Base.copyto!(dest::EyeKronecker, a::Summed{<:KroneckerStyle{<:Any,EyeStyle()}})
   dest2 = arg2(dest)
   f = LinearCombination(a)
-  args = arguments(a)
+  args = MapBroadcast.arguments(a)
   arg2s = arg2.(args)
   dest2 .= f.(arg2s...)
   return dest
 end
-function Base.copyto!(dest::KroneckerEye, a::Sum{<:KroneckerStyle{<:Any,<:Any,EyeStyle()}})
+function Base.copyto!(
+  dest::KroneckerEye, a::Summed{<:KroneckerStyle{<:Any,<:Any,EyeStyle()}}
+)
   dest1 = arg1(dest)
   f = LinearCombination(a)
-  args = arguments(a)
+  args = MapBroadcast.arguments(a)
   arg1s = arg1.(args)
   dest1 .= f.(arg1s...)
   return dest
 end
-function Base.copyto!(dest::EyeEye, a::Sum{<:KroneckerStyle{<:Any,EyeStyle(),EyeStyle()}})
+function Base.copyto!(
+  dest::EyeEye, a::Summed{<:KroneckerStyle{<:Any,EyeStyle(),EyeStyle()}}
+)
   return error("Can't write in-place to `Eye ⊗ Eye`.")
 end
 
@@ -162,25 +166,25 @@ function Base.similar(bc::Broadcasted{<:DeltaStyle}, elt::Type)
 end
 
 # TODO: Dispatch on `DeltaStyle`.
-function Base.copyto!(dest::DeltaKronecker, a::Sum{<:KroneckerStyle})
+function Base.copyto!(dest::DeltaKronecker, a::Summed{<:KroneckerStyle})
   dest2 = arg2(dest)
   f = LinearCombination(a)
-  args = arguments(a)
+  args = MapBroadcast.arguments(a)
   arg2s = arg2.(args)
   dest2 .= f.(arg2s...)
   return dest
 end
 # TODO: Dispatch on `DeltaStyle`.
-function Base.copyto!(dest::KroneckerDelta, a::Sum{<:KroneckerStyle})
+function Base.copyto!(dest::KroneckerDelta, a::Summed{<:KroneckerStyle})
   dest1 = arg1(dest)
   f = LinearCombination(a)
-  args = arguments(a)
+  args = MapBroadcast.arguments(a)
   arg1s = arg1.(args)
   dest1 .= f.(arg1s...)
   return dest
 end
 # TODO: Dispatch on `DeltaStyle`.
-function Base.copyto!(dest::DeltaDelta, a::Sum{<:KroneckerStyle})
+function Base.copyto!(dest::DeltaDelta, a::Summed{<:KroneckerStyle})
   return error("Can't write in-place to `Delta ⊗ Delta`.")
 end
 
diff --git a/src/kroneckerarray.jl b/src/kroneckerarray.jl
index 9d30a08..bde7b33 100644
--- a/src/kroneckerarray.jl
+++ b/src/kroneckerarray.jl
@@ -49,6 +49,7 @@ function _copyto!!(dest::AbstractArray{<:Any,N}, src::AbstractArray{<:Any,N}) wh
   copyto!(dest, src)
   return dest
 end
+using Base.Broadcast: Broadcasted
 function _copyto!!(dest::AbstractArray, src::Broadcasted)
   copyto!(dest, src)
   return dest
@@ -368,11 +369,12 @@ function Base.map!(f, dest::KroneckerArray, a1::KroneckerArray, a_rest::Kronecke
   return dest
 end
 
-function Base.copyto!(dest::KroneckerArray, a::Sum{<:KroneckerStyle})
+using MapBroadcast: MapBroadcast, LinearCombination, Summed
+function Base.copyto!(dest::KroneckerArray, a::Summed{<:KroneckerStyle})
   dest1 = arg1(dest)
   dest2 = arg2(dest)
   f = LinearCombination(a)
-  args = arguments(a)
+  args = MapBroadcast.arguments(a)
   arg1s = arg1.(args)
   arg2s = arg2.(args)
   if allequal(arg2s)
@@ -393,26 +395,26 @@ end
 
 # Linear operations.
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(+), a, b)
-  return Sum(a) + Sum(b)
+  return Summed(a) + Summed(b)
 end
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(-), a, b)
-  return Sum(a) - Sum(b)
+  return Summed(a) - Summed(b)
 end
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(*), c::Number, a)
-  return c * Sum(a)
+  return c * Summed(a)
 end
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(*), a, c::Number)
-  return Sum(a) * c
+  return Summed(a) * c
 end
 # Fix ambiguity error.
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(*), a::Number, b::Number)
   return a * b
 end
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(/), a, c::Number)
-  return Sum(a) / c
+  return Summed(a) / c
 end
 function Broadcast.broadcasted(::KroneckerStyle, ::typeof(-), a)
-  return -Sum(a)
+  return -Summed(a)
 end
 
 # Rewrite rules to canonicalize broadcast expressions.