diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4f25f33ab7..c27a9a95a5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -32,18 +32,23 @@ jobs:
           - version: 'nightly'
             os: ubuntu-latest
             arch: x64
+            downgrade: false
           - version: '1'
             os: ubuntu-latest
             arch: x64
+            downgrade: false
           - version: '1'
             os: windows-latest
             arch: x64
+            downgrade: false
           - version: '1.10'
             os: ubuntu-latest
             arch: x64
+            downgrade: true
           - version: '1'
             os: ubuntu-latest
             arch: x86
+            downgrade: false
     steps:
       - uses: actions/checkout@v4
       - uses: julia-actions/setup-julia@v2
@@ -51,10 +56,16 @@ jobs:
           version: ${{ matrix.machine.version }}
           arch: ${{ matrix.machine.arch }}
       - uses: julia-actions/cache@v1
+      - if: ${{ matrix.machine.downgrade }}
+        uses: julia-actions/julia-downgrade-compat@v2
+        with:
+          mode: deps
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
         with:
           depwarn: error
+          allow_reresolve: ${{ !matrix.machine.downgrade }}
+          force_latest_compatible_version: ${{ !matrix.machine.downgrade }}
         env:
             MOI_TEST_MODULES: ${{ matrix.moi_test_modules }}
       - uses: julia-actions/julia-processcoverage@v1
diff --git a/Project.toml b/Project.toml
index 930997db9b..5dab57eba0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -22,8 +22,8 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 BenchmarkTools = "1"
 CodecBzip2 = "0.6, 0.7, 0.8"
 CodecZlib = "0.6, 0.7"
-ForwardDiff = "0.10, 1"
-JSON = "1"
+ForwardDiff = "1"
+JSON = "0.21, 1"
 JSONSchema = "1"
 LinearAlgebra = "1"
 MutableArithmetics = "1"
@@ -32,7 +32,7 @@ OrderedCollections = "1"
 PrecompileTools = "1"
 Printf = "1"
 SparseArrays = "1"
-SpecialFunctions = "0.8, 1, 2"
+SpecialFunctions = "1, 2"
 Test = "1"
 julia = "1.10"