diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 446f4d0..7ab71b4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -55,7 +55,7 @@ CI image:
 pytest:
   stage: test
   script:
-    - pdm sync --clean -G test -G pyvista
+    - pdm sync --clean -G test -G pyvista -G solvers
     - pdm run pytest tests doc/examples --cov --cov-report term --cov-report xml
   coverage: /(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/
   artifacts:
@@ -68,7 +68,7 @@ pytest:
 pages:
   stage: publish
   script:
-    - pdm sync --clean -G pyvista -G doc
+    - pdm sync --clean -G pyvista -G doc -G solvers
     - pdm run xvfb-run --auto-servernum sphinx-build -W -b html -d doc/_build/doctrees doc doc/_build/html
     - mkdir -p public/$CI_COMMIT_REF_NAME
     - rsync -rvc --delete doc/_build/html/* public/$CI_COMMIT_REF_NAME/
diff --git a/.readthedocs.yml b/.readthedocs.yml
index 9880aa8..bc6732d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -11,7 +11,7 @@ build:
       - pip install pdm
     post_install:
       - pdm use -f $READTHEDOCS_VIRTUALENV_PATH
-      - pdm sync -G pyvista -G doc
+      - pdm sync -G pyvista -G doc -G solvers
       - pip uninstall vtk -y
       - pip install vtk-osmesa --extra-index-url https://gitlab.kitware.com/api/v4/projects/13/packages/pypi/simple
 
diff --git a/noxfile.py b/noxfile.py
index 9f207ed..a3479e6 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -10,15 +10,16 @@
 
 @nox.session
 def test(session):
-    session.run_always(
-        "pdm", "sync", "-G", "test", "-G", "pyvista", "--clean", external=True
-    )
+    command = "pdm sync -G test -G pyvista -G solvers --clean"
+    session.run_always(command.split(), external=True)
     session.run("pdm", "run", "cov-xml", external=True)
 
 
 @nox.session
 def doc(session):
-    session.run_always("pdm", "sync", "-G", "doc", "--clean", external=True)
+    session.run_always(
+        "pdm", "sync", "-G", "doc", "-G", "solvers", "--clean", external=True
+    )
     session.chdir("doc")
     session.run("make", "cleanall", external=True)
     session.run("make", external=True)
diff --git a/pdm.lock b/pdm.lock
index cb671db..4ec04e9 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "dev", "doc", "jupyter", "pyvista", "qt", "solvers", "test"]
 strategy = ["cross_platform"]
 lock_version = "4.4.1"
-content_hash = "sha256:3f9c72d74ade371240a10a05676b62a384b903e01e60fbb6e6d0ff5bda13210b"
+content_hash = "sha256:dbd5989aa6462745d309e03a755fb82475f3f0926901c4b6fcdc3d06fdaddd4d"
 
 [[package]]
 name = "accessible-pygments"
@@ -1911,12 +1911,12 @@ files = [
 
 [[package]]
 name = "nest-asyncio"
-version = "1.5.9"
+version = "1.6.0"
 requires_python = ">=3.5"
 summary = "Patch asyncio to allow nested event loops"
 files = [
-    {file = "nest_asyncio-1.5.9-py3-none-any.whl", hash = "sha256:61ec07ef052e72e3de22045b81b2cc7d71fceb04c568ba0b2e4b2f9f5231bec2"},
-    {file = "nest_asyncio-1.5.9.tar.gz", hash = "sha256:d1e1144e9c6e3e6392e0fcf5211cb1c8374b5648a98f1ebe48e5336006b41907"},
+    {file = "nest_asyncio-1.6.0-py3-none-any.whl", hash = "sha256:87af6efd6b5e897c81050477ef65c62e2b2f35d51703cae01aff2905b1852e1c"},
+    {file = "nest_asyncio-1.6.0.tar.gz", hash = "sha256:6f172d5449aca15afd6c646851f4e31e02c598d553a667e38cafa997cfec55fe"},
 ]
 
 [[package]]
@@ -2006,12 +2006,12 @@ files = [
 
 [[package]]
 name = "overrides"
-version = "7.4.0"
+version = "7.6.0"
 requires_python = ">=3.6"
 summary = "A decorator to automatically detect mismatch when overriding a method."
 files = [
-    {file = "overrides-7.4.0-py3-none-any.whl", hash = "sha256:3ad24583f86d6d7a49049695efe9933e67ba62f0c7625d53c59fa832ce4b8b7d"},
-    {file = "overrides-7.4.0.tar.gz", hash = "sha256:9502a3cca51f4fac40b5feca985b6703a5c1f6ad815588a7ca9e285b9dca6757"},
+    {file = "overrides-7.6.0-py3-none-any.whl", hash = "sha256:c36e6635519ea9c5b043b65c36d4b886aee8bd45b7d4681d2a6df0898df4b654"},
+    {file = "overrides-7.6.0.tar.gz", hash = "sha256:01e15bbbf15b766f0675c275baa1878bd1c7dc9bc7b9ee13e677cdba93dc1bd9"},
 ]
 
 [[package]]
@@ -2101,6 +2101,15 @@ files = [
     {file = "pexpect-4.9.0.tar.gz", hash = "sha256:ee7d41123f3c9911050ea2c2dac107568dc43b2d3b0c7557a33212c398ead30f"},
 ]
 
+[[package]]
+name = "pickleshare"
+version = "0.7.5"
+summary = "Tiny 'shelve'-like database with concurrency support"
+files = [
+    {file = "pickleshare-0.7.5-py2.py3-none-any.whl", hash = "sha256:9649af414d74d4df115d5d718f82acb59c9d418196b7b4290ed47a12ce62df56"},
+    {file = "pickleshare-0.7.5.tar.gz", hash = "sha256:87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca"},
+]
+
 [[package]]
 name = "pillow"
 version = "10.2.0"
diff --git a/pyproject.toml b/pyproject.toml
index 92b0ef2..b0ff144 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ dependencies = [
     "lark<2.0.0,>=1.1.5",
     "rich<14.0.0,>=13.3.3",
     "invoke<3.0.0,>=2.0.0",
+    "pickleshare>=0.7.5",
 ]
 requires-python = ">=3.9,<4.0"
 readme = "README.md"
@@ -53,7 +54,7 @@ test = [
     "pytest-mock<4.0.0,>=3.10.0",
     "pytest-cov<5.0.0,>=4.0.0",
     "pip",
-    "fluidsimfoam[solvers]"
+    # "fluidsimfoam[solvers]"
 ]
 dev = [
     "black<24.0.0,>=23.1.0",
@@ -68,7 +69,7 @@ doc = [
     "pydata-sphinx-theme<1.0.0,>=0.13.1",
     "sphinx-togglebutton<1.0.0,>=0.3.2",
     "pyvista<1.0.0,>=0.39.1",
-    "fluidsimfoam[solvers]",
+    # "fluidsimfoam[solvers]",
 ]
 
 [tool.pdm.scripts]