diff --git a/benchmarks/ParameterEstimation/Project.toml b/benchmarks/ParameterEstimation/Project.toml
index 88e7f6917..714cee1ef 100644
--- a/benchmarks/ParameterEstimation/Project.toml
+++ b/benchmarks/ParameterEstimation/Project.toml
@@ -16,7 +16,7 @@ BenchmarkTools = "1.0"
 BlackBoxOptim = "0.6"
 DiffEqParamEstim = "1.15"
 Distributions = "0.25"
-NLopt = "0.6"
+NLopt = "0.6, 1"
 OrdinaryDiffEq = "6"
 ParameterizedFunctions = "5.3"
 Plots = "1.4"