diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 51c11d6d..6aaa25a0 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -35,7 +35,7 @@ jobs:
         id: venv-cache
         with:
           path: venv
-          key: docs-venv-v1-${{ hashFiles('requirements/CI-docs/requirements.txt') }}
+          key: docs-venv-v3-${{ hashFiles('requirements/CI-docs/requirements.txt') }}
 
       - name: Create venv and install deps (one by one to avoid conflict errors)
         if: steps.venv-cache.outputs.cache-hit != 'true'
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fb5d2d1b..cb263f4e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -4,11 +4,12 @@ on:
   pull_request:
   push:
     branches: [main]
+    tags:
 
 jobs:
   pre-commit:
     name: Lint
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     steps:
       - name: Cancel Previous Runs
         uses: styfle/cancel-workflow-action@0.11.0
@@ -20,9 +21,7 @@ jobs:
           python-version: "3.10"
       - name: install clang-format
         run: |
-          sudo apt-get remove -y clang-6.0 libclang-common-6.0-dev libclang1-6.0 libllvm6.0
-          sudo apt-get autoremove
-          sudo apt-get install clang-format clang-format-6.0
+          pip install clang-format==6.0.1
       - uses: pre-commit/action@v3.0.0
 
   test:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 146e672f..a5b475e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## [0.3.1] - 2023-04-19
+
+Bug fix release for a bad dependency specification.
+
+
 ## [0.3.0] - 2022-10-25
 
 **Features**
diff --git a/docs/notebook-simulation.trees b/docs/notebook-simulation.trees
index 79f122e3..0ec020b3 100644
Binary files a/docs/notebook-simulation.trees and b/docs/notebook-simulation.trees differ