diff --git a/.devcontainer/post_create.sh b/.devcontainer/post_create.sh
index 272b6ba23..bc55b4c05 100755
--- a/.devcontainer/post_create.sh
+++ b/.devcontainer/post_create.sh
@@ -16,7 +16,7 @@ git add .
 
 # Install tox and pre-commit
 pipx install pre-commit
-pipx install tox
+pipx install tox==4.18.0
 
 # Sanity check that we can run pre-commit env
 pre-commit run mypy --all-files
diff --git a/.github/workflows/jira_cloud_ci.yml b/.github/workflows/jira_cloud_ci.yml
index 377dd06cc..8f61c5490 100644
--- a/.github/workflows/jira_cloud_ci.yml
+++ b/.github/workflows/jira_cloud_ci.yml
@@ -38,7 +38,7 @@ jobs:
         run: |
           sudo apt-get update; sudo apt-get install gcc libkrb5-dev
           python -m pip install --upgrade pip
-          python -m pip install --upgrade tox tox-gh-actions
+          python -m pip install --upgrade tox==4.18.0 tox-gh-actions
 
       - name: Test with tox
         run: tox -e py39 -- -m allow_on_cloud
diff --git a/.github/workflows/jira_server_ci.yml b/.github/workflows/jira_server_ci.yml
index 9b5ca43b2..3a9d027f9 100644
--- a/.github/workflows/jira_server_ci.yml
+++ b/.github/workflows/jira_server_ci.yml
@@ -29,7 +29,7 @@ jobs:
         run: |
           sudo apt-get update; sudo apt-get install gcc libkrb5-dev
           python -m pip install --upgrade pip
-          python -m pip install --upgrade tox tox-gh-actions
+          python -m pip install --upgrade tox==4.18.0 tox-gh-actions
 
       - name: Lint with tox
         if: ${{ 'Skipped as pre-commit GHA also running'== 'true' }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2e7fb6c47..ff013a93e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
         python-version: 3.9
 
     - name: Install build dependencies
-      run: python3 -m pip install --user tox
+      run: python3 -m pip install --user tox==4.18.0
 
     - name: Check out src from Git
       uses: actions/checkout@v4
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 507c6d9c6..534a9978f 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -80,7 +80,7 @@ jobs:
 
       - name: Install tox
         run: |
-          python3 -m pip install --upgrade pip wheel tox
+          python3 -m pip install --upgrade pip wheel tox==4.18.0
 
       - run: ${{ matrix.command }}