diff --git a/.github/workflows/test_workflow.yml b/.github/workflows/test_workflow.yml
index ab9c07f..b0ed6f1 100644
--- a/.github/workflows/test_workflow.yml
+++ b/.github/workflows/test_workflow.yml
@@ -26,7 +26,7 @@ jobs:
 
         -   name: Install dependencies
             run: |
-                pdm install && pdm install -G test
+                pdm install -G test
 
         -   name: Run test suite
             run: |
diff --git a/README.md b/README.md
index c8785e1..bcff9c3 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ curl -sSL https://raw.githubusercontent.com/pdm-project/pdm/main/install-pdm.py
 Please run:
 
 ```bash
-pdm install
+pdm install -G core
 ```
 
 **Note**: If you want to run the tests or the experiments, please install the additional dependencies, i.e., `test` and `exps`, respectively, using the following command:
diff --git a/pdm.lock b/pdm.lock
index 38b19ef..7eb8c48 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -2,10 +2,10 @@
 # It is not intended for manual editing.
 
 [metadata]
-groups = ["default", "test", "exps"]
+groups = ["default", "core", "exps", "test"]
 strategy = ["cross_platform"]
 lock_version = "4.4"
-content_hash = "sha256:440b9bbf3b91ee28aee37a71d818d459661984e75d2fa89ef19d3f15328ec7d7"
+content_hash = "sha256:4601d1a24088d1a408ecd180151540159416215b4b9aa7ab28f70d63fd48cfa4"
 
 [[package]]
 name = "aiohttp"
diff --git a/pyproject.toml b/pyproject.toml
index c511bd2..3c646e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ dependencies = [
     "scikit-learn>=1.2.2",
     "scipy>=1.9.3",
     "setuptools>=67.7.2",
+    "torch>=2.0.0",
 ]
 requires-python = ">=3.9"
 readme = "README.md"
@@ -27,7 +28,9 @@ url = "https://download.pytorch.org/whl/cpu/torch_stable.html"
 name = "torch"
 
 [tool.pdm.dev-dependencies]
+core = []
 test = [
+    "docopt>=0.6.2",
     "mypy>=1.2.0",
     "plotly>=5.14.1",
     "pylint>=2.17.2",
@@ -39,7 +42,6 @@ exps = [
     "pillow>=9.5.0",
     "plotly>=5.14.1",
     "setuptools-rust>=1.6.0",
-    "torch>=2.0.0",
     "torchvision>=0.15.2",
     "transformers>=4.28.1",
     "umap-learn>=0.5.3",