diff --git a/.github/workflows/Downgrade.yml b/.github/workflows/Downgrade.yml
index 401aa7e..1bd02fe 100644
--- a/.github/workflows/Downgrade.yml
+++ b/.github/workflows/Downgrade.yml
@@ -12,7 +12,6 @@ on:
       - 'docs/**'
 jobs:
   test:
-    if: false # Temporarily disabled - see https://github.com/SciML/ModelingToolkitNeuralNets.jl/issues/105
     name: "Downgrade"
     strategy:
       matrix:
diff --git a/Project.toml b/Project.toml
index 9518b2a..0baeb2a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,30 +15,30 @@ Symbolics = "0c5d862f-8b57-4792-8d23-62f2024744c7"
 [compat]
 Aqua = "0.8"
 ComponentArrays = "0.15.28"
-DifferentiationInterface = "0.6, 0.7"
-ForwardDiff = "0.10.36, 1"
+DifferentiationInterface = "0.7.18"
+ForwardDiff = "1.1"
 IntervalSets = "0.7.10"
-JET = "0.8, 0.9, 0.10, 0.11"
+JET = "0.8.22, 0.9, 0.10, 0.11"
 Lux = "1.14"
 LuxCore = "1.2"
 ModelingToolkit = "11.7.1"
-ModelingToolkitBase = "1.6.2"
-ModelingToolkitStandardLibrary = "2.24"
-OptimizationBase = "4.0.2, 5"
+ModelingToolkitBase = "1.31.0"
+ModelingToolkitStandardLibrary = "2.27"
+OptimizationBase = "4.1, 5"
 OptimizationOptimJL = "0.4.8"
-OptimizationOptimisers = "0.3"
-OrdinaryDiffEqVerner = "1, 2"
+OptimizationOptimisers = "0.3.14"
+OrdinaryDiffEqVerner = "1.10, 2"
 Random = "1.10"
 SafeTestsets = "0.1"
 SciCompDSL = "1"
-SciMLSensitivity = "7.72"
-SciMLStructures = "1.1.0"
+SciMLSensitivity = "7.93"
+SciMLStructures = "1.10"
 StableRNGs = "1"
 Statistics = "1.10"
-SymbolicIndexingInterface = "0.3.41"
-Symbolics = "7"
+SymbolicIndexingInterface = "0.3.43"
+Symbolics = "7.8"
 Test = "1.10"
-Zygote = "0.6.73, 0.7"
+Zygote = "0.7.5"
 julia = "1.10"
 
 [extras]
diff --git a/test/runtests.jl b/test/runtests.jl
index c455989..5f4b3a7 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,7 +2,7 @@ using ModelingToolkitNeuralNets
 using Test
 using SafeTestsets
 
-const GROUP = ENV["GROUP"]
+const GROUP = get(ENV, "GROUP", "All")
 
 @testset verbose = true "ModelingToolkitNeuralNets.jl" begin
     if GROUP != "Core"