diff --git a/src/MultiScaleArrays.jl b/src/MultiScaleArrays.jl
index 102dced..e1daa50 100644
--- a/src/MultiScaleArrays.jl
+++ b/src/MultiScaleArrays.jl
@@ -134,7 +134,7 @@ struct Organ{B <: Number, P} <: AbstractMultiScaleArrayLeaf{B}
     params::P
 end
 
-struct Plant{B, S, N <: Tuple{Vararg{<:Organ{<:Number}}}} <: AbstractMultiScaleArray{B}
+struct Plant{B, S, N <: Tuple{Vararg{Organ{<:Number}}}} <: AbstractMultiScaleArray{B}
     nodes::N
     values::Vector{B}
     end_idxs::Vector{Int}
@@ -147,7 +147,7 @@ struct Community{B, N <: Tuple{Vararg{<:Plant{<:Number}}}} <: AbstractMultiScale
     end_idxs::Vector{Int}
 end
 
-mutable struct Scenario{B, N <: Tuple{Vararg{<:Community{<:Number}}}} <:
+mutable struct Scenario{B, N <: Tuple{Vararg{Community{<:Number}}}} <:
                AbstractMultiScaleArrayHead{B}
     nodes::N
     values::Vector{B}
diff --git a/src/shape_construction.jl b/src/shape_construction.jl
index 11464d6..30ba788 100644
--- a/src/shape_construction.jl
+++ b/src/shape_construction.jl
@@ -50,10 +50,10 @@ where {T <: AbstractMultiScaleArray}) = __construct(T, nodes, eltype(T)[], args.
 (construct(::Type{T}, nodes::AbstractVector{<:AbstractMultiScaleArray}, values, args...)
 where {T <: AbstractMultiScaleArray}) = __construct(T, nodes, values, args...)
 
-(construct(::Type{T}, nodes::Tuple{Vararg{<:AbstractMultiScaleArray}}, args...)
+(construct(::Type{T}, nodes::Tuple{Vararg{AbstractMultiScaleArray}}, args...)
 where {T <: AbstractMultiScaleArray}) = __construct(T, nodes, eltype(T)[], args...)
 
-(construct(::Type{T}, nodes::Tuple{Vararg{<:AbstractMultiScaleArray}}, values, args...)
+(construct(::Type{T}, nodes::Tuple{Vararg{AbstractMultiScaleArray}}, values, args...)
 where {T <: AbstractMultiScaleArray}) = __construct(T, nodes, values, args...)
 
 function vcat(m1::AbstractMultiScaleArray, m2::AbstractMultiScaleArray)
diff --git a/test/tuple_nodes.jl b/test/tuple_nodes.jl
index c7d96a1..8698c77 100644
--- a/test/tuple_nodes.jl
+++ b/test/tuple_nodes.jl
@@ -14,20 +14,20 @@ struct Organ{B <: Number, P} <: AbstractMultiScaleArrayLeaf{B}
     params::P
 end
 
-struct Plant{B, S, N <: Tuple{Vararg{<:Organ{<:Number}}}} <: AbstractMultiScaleArray{B}
+struct Plant{B, S, N <: Tuple{Vararg{Organ{<:Number}}}} <: AbstractMultiScaleArray{B}
     nodes::N
     values::Vector{B}
     end_idxs::Vector{Int}
     settings::S
 end
 
-struct Community{B, N <: Tuple{Vararg{<:Plant{<:Number}}}} <: AbstractMultiScaleArray{B}
+struct Community{B, N <: Tuple{Vararg{Plant{<:Number}}}} <: AbstractMultiScaleArray{B}
     nodes::N
     values::Vector{B}
     end_idxs::Vector{Int}
 end
 
-mutable struct Scenario{B, N <: Tuple{Vararg{<:Community{<:Number}}}} <:
+mutable struct Scenario{B, N <: Tuple{Vararg{Community{<:Number}}}} <:
                AbstractMultiScaleArrayHead{B}
     nodes::N
     values::Vector{B}