diff --git a/Project.toml b/Project.toml
index 1d5443614..ee3a4ea68 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "COBREXA"
 uuid = "babc4406-5200-4a30-9033-bf5ae714c842"
 authors = ["The developers of COBREXA.jl"]
-version = "1.5"
+version = "1.5.1"
 
 [deps]
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
diff --git a/src/base/types/SBMLModel.jl b/src/base/types/SBMLModel.jl
index 96c0633b8..afd13ebb0 100644
--- a/src/base/types/SBMLModel.jl
+++ b/src/base/types/SBMLModel.jl
@@ -180,7 +180,7 @@ $(TYPEDSIGNATURES)
 Objective of the [`SBMLModel`](@ref).
 """
 function objective(model::SBMLModel)::SparseVec
-    res = sparsevec([], [], n_reactions(model))
+    res = spzeros(n_reactions(model))
 
     objective = get(model.sbml.objectives, model.active_objective, nothing)
     if isnothing(objective) && length(model.sbml.objectives) == 1