diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a5a49ce..ad9bb9b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -26,15 +26,14 @@ jobs:
         python-version: ${{ matrix.python-version }}
         allow-prereleases: true
 
-    - name: Install dependencies
+    - name: Install test dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install setuptools wheel cython numpy "w3lib<2.0"
         pip install pytest pytest-cov
 
     - name: Build and install package
       run: |
-        CYTHONIZE=1 pip install -e . --no-build-isolation
+        pip install -e .
 
     - name: Run tests
       run: |
@@ -78,10 +77,9 @@ jobs:
         with:
           python-version: '3.12'
 
-      - name: Install dependencies
+      - name: Install build tool
         run: |
-          python -m pip install --upgrade pip
-          pip install build setuptools wheel cython numpy
+          python -m pip install --upgrade pip build
 
       - name: Build sdist
         run: python -m build --sdist
diff --git a/pyproject.toml b/pyproject.toml
index 41c37ef..2bef9c7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ classifiers = [
 ]
 dependencies = [
     "numpy",
-    "w3lib",
+    "w3lib<2.0",
 ]
 
 [project.urls]
diff --git a/requirements.txt b/requirements.txt
index 19b3a6c..9f9dff2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 numpy
-w3lib
+w3lib<2.0