diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index fee5ac5..c60783a 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -12,17 +12,19 @@ jobs:
   build:
     runs-on: ubuntu-latest
     timeout-minutes: 30
-    container: ghcr.io/fenics/dolfinx/dolfinx:v0.7.0
+    container: ghcr.io/fenics/dolfinx/dolfinx:nightly
     steps:
       - uses: actions/checkout@v4
 
       - name: Install dependencies
-        run: |
-          python3 -m pip install -r requirements.txt
+        run: python3 -m pip install -r requirements.txt
 
       - name: Flake8 code
         run: python3 -m flake8 .
 
+      - name: Type-checking
+        run: python3 -m mypy .
+
       - name: Run Taylor-Green problem
         run: python3 ipcs.py --spatial=4 --temporal=2
 
diff --git a/.gitignore b/.gitignore
index 27ee587..609a8c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,7 @@
 *.pvd
 
 *.xdmf
-*.h5
\ No newline at end of file
+*.h5
+*.bp
+__pycache__
+*.msh
\ No newline at end of file
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 24d74eb..0429535 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,3 +1,3 @@
-FROM dolfinx/dolfinx:v0.7.0
+FROM ghcr.io/fenics/dolfinx/dolfinx:nightly
 COPY requirements.txt requirements.txt
 RUN pip3 install -r requirements.txt