diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a12c82f..76698ce 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,6 +19,7 @@ jobs:
       matrix:
         version:
           - '1.10'
+          - '1.11'
         os:
           - ubuntu-latest
         arch:
@@ -29,6 +30,8 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
+      - uses: julia-actions/julia-downgrade-compat@v1
+        if: ${{ matrix.version == '1.10' }}
       - uses: julia-actions/cache@v1
       - name: Set CAT packages to develop & resolve env
         run: |
diff --git a/Project.toml b/Project.toml
index ced0d48..bba2b81 100644
--- a/Project.toml
+++ b/Project.toml
@@ -7,8 +7,6 @@ version = "0.3.0"
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"
 AutoHashEquals = "15f4f7f2-30c1-5605-9d31-71845cf9641f"
 ConstructionBase = "187b0558-2788-49d3-abe0-74a17ed4e7c9"
-Cuba = "8a292aeb-7a57-582c-b821-06e4c11590b1"
-Cubature = "667455a9-e2ce-5579-9412-b964f529a492"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
 DocStringExtensions = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
@@ -16,7 +14,6 @@ EffectSizes = "e248de7e-9197-5860-972e-353a2af44d75"
 FillArrays = "1a297f60-69ca-5386-bcde-b61e274b549b"
 FittedItemBanks = "3f797b09-34e4-41d7-acf6-3302ae3248a5"
 ForwardDiff = "f6369f11-7733-5829-9624-2563aa707210"
-HCubature = "19dc6840-f33b-545b-b366-655c7e3ffd49"
 HypothesisTests = "09f84164-cd44-5f33-b23f-e6b0d136a0d5"
 Interpolations = "a98d9a8b-a2ab-59e6-89dd-64a1c18fca59"
 KernelAbstractions = "63c18a36-062a-441e-b654-da1e3ab1ce7c"
@@ -26,15 +23,11 @@ LogarithmicNumbers = "aa2f6b4e-9042-5d33-9679-40d3a6b85899"
 MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
 Measurements = "eff96d63-e80a-5855-80a2-b1b0885c5ab7"
 Mmap = "a63ad114-7e13-5084-954f-fe012c677804"
-NLSolversBase = "d41bc354-129a-5804-8e4c-c37616107c6c"
-Optim = "429524aa-4258-5aef-a3af-852621145aeb"
 OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
 Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 PsychometricsBazaarBase = "b0d9cada-d963-45e9-a4c6-4746243987f1"
-QuadGK = "1fd47b50-473d-5c70-9696-f719f8f3bcdc"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
-Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 Setfield = "efcf1570-3423-57d1-acb7-fd33fddbac46"
 SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
@@ -43,36 +36,29 @@ StatsFuns = "4c63d2b9-4356-54db-8cca-17b64c39e42c"
 UnPack = "3a884ed6-31ef-47d7-9d2a-63182c4928ed"
 
 [compat]
-Accessors = "0.1"
+Accessors = "^0.1.12"
 AutoHashEquals = "2"
-ConstructionBase = "1"
-Cuba = "2"
-Cubature = "1"
+ConstructionBase = "^1.2"
 DataFrames = "1.6.1"
-Distributions = "0.25"
-DocStringExtensions = "^0.8, ^0.9"
+Distributions = "^0.25.88"
+DocStringExtensions = " ^0.9"
 EffectSizes = "^1.0.1"
 FillArrays = "0.13, 1.5.0"
-FittedItemBanks = "^0.6.0"
-ForwardDiff = "0.10"
-HCubature = "1"
-HypothesisTests = "^0.11.0"
-Interpolations = "0.13, 0.14"
+FittedItemBanks = "^0.6.3"
+ForwardDiff = "0.10.24"
+HypothesisTests = "^0.10.12, ^0.11.0"
+Interpolations = "^0.14, ^0.15"
 KernelAbstractions = "^0.9.22"
 Lazy = "0.15"
 LogarithmicNumbers = "1"
-MacroTools = "0.5"
-Measurements = "2"
-NLSolversBase = "7"
-Optim = "1"
-OrderedCollections = "1"
-PsychometricsBazaarBase = "^0.7.0"
-QuadGK = "2.5.0"
+MacroTools = "^0.5.6"
+Measurements = "^2.10.0"
+OrderedCollections = "^1.6"
+PsychometricsBazaarBase = "^0.8.0"
 Reexport = "1"
-Requires = "1"
-Setfield = "0.8, 1"
+Setfield = "^1"
 StaticArrays = "1"
-StatsBase = "0.33, 0.34.0"
-StatsFuns = "1"
+StatsBase = "^0.34"
+StatsFuns = "^0.9.15, ^1"
 UnPack = "1"
 julia = "^1.10"
diff --git a/src/aggregators/Aggregators.jl b/src/aggregators/Aggregators.jl
index 9c2b487..945ba5c 100644
--- a/src/aggregators/Aggregators.jl
+++ b/src/aggregators/Aggregators.jl
@@ -8,7 +8,6 @@ module Aggregators
 using PsychometricsBazaarBase.Parameters
 using StaticArrays: SVector
 using Distributions: Distribution, Normal, Distributions
-using HCubature
 using Base.Threads
 using ForwardDiff: ForwardDiff
 
diff --git a/src/next_item_rules/NextItemRules.jl b/src/next_item_rules/NextItemRules.jl
index a212316..0fc5806 100644
--- a/src/next_item_rules/NextItemRules.jl
+++ b/src/next_item_rules/NextItemRules.jl
@@ -27,7 +27,7 @@ using FittedItemBanks
 using FittedItemBanks: item_params
 using ..Aggregators
 
-using QuadGK, Distributions, Optim, Base.Threads, Base.Order, StaticArrays
+using Distributions, Base.Threads, Base.Order, StaticArrays
 using ConstructionBase: constructorof
 import ForwardDiff
 
diff --git a/test/Project.toml b/test/Project.toml
index 295d2c6..61ce277 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -15,8 +15,8 @@ XUnit = "3e3c03f2-1a94-11e9-2981-050a4ca824ab"
 
 [compat]
 Aqua = "0.5.5, 0.6.5"
-Distributions = "0.25.76"
+Distributions = "0.25.88"
 FittedItemBanks = "^0.6"
 Optim = "1.7.3"
-PsychometricsBazaarBase = "^0.5, ^0.6, ^0.7"
+PsychometricsBazaarBase = "^0.8"
 julia = "^1.10"
diff --git a/test/dt.jl b/test/dt.jl
index fb52c1a..0372378 100644
--- a/test/dt.jl
+++ b/test/dt.jl
@@ -4,7 +4,7 @@
     num_questions = 20,
     num_testees = 1
 )
-integrator = FunctionIntegrator(even_grid(-6, 6, 61))
+integrator = FunctionIntegrator(Integrators.even_grid(-6, 6, 61))
 ability_estimator = MeanAbilityEstimator(LikelihoodAbilityEstimator(), integrator)
 get_response = auto_responder(@view true_responses[:, 1])