diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0be03f6..bae7de2 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -32,9 +32,9 @@ jobs:
     outputs:
       wheel-distribution: ${{ steps.wheel-distribution.outputs.path }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with: {fetch-depth: 0}  # deep clone for setuptools-scm
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         id: setup-python
         with: {python-version: "3.11"}
       - name: Run static analysis and format checkers
@@ -49,7 +49,7 @@ jobs:
       - name: Store the distribution files for use in other stages
         # `tests` and `publish` will use the same pre-built distributions,
         # so we make sure to release the exact same package that was tested
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: python-distribution-files
           path: dist/
@@ -60,7 +60,7 @@ jobs:
     strategy:
       matrix:
         python:
-        - "3.7"  # oldest Python supported by PSF
+        - "3.8"  # oldest Python supported by PSF
         - "3.11"  # newest Python that is stable
         platform:
         - ubuntu-latest
@@ -68,13 +68,13 @@ jobs:
         - windows-latest
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         id: setup-python
         with:
           python-version: ${{ matrix.python }}
       - name: Retrieve pre-built distribution files
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with: {name: python-distribution-files, path: dist/}
       - name: Run tests
         run: >-
@@ -108,11 +108,11 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with: {python-version: "3.11"}
       - name: Retrieve pre-built distribution files
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with: {name: python-distribution-files, path: dist/}
       # - name: Publish Package (TEST)
       #   env:
diff --git a/setup.cfg b/setup.cfg
index f4cc25b..9e3f07e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -54,7 +54,7 @@ package_dir =
     =src
 
 # Require a min/specific Python version (comma-separated conditions)
-python_requires = >=3.6
+python_requires = >=3.8
 
 # Add here dependencies of your project (line-separated), e.g. requests>=2.2,<3.0.
 # Version specifiers like >=2.2,<3.0 avoid problems due to API changes in
@@ -64,7 +64,7 @@ install_requires =
     importlib-metadata; python_version<"3.8"
     pandas>=0.24.0
     scipy
-    numpy
+    numpy<2.0.0
     matplotlib
 
 
diff --git a/src/pysubgroup/subgroup_description.py b/src/pysubgroup/subgroup_description.py
index 072319d..c5e61b3 100644
--- a/src/pysubgroup/subgroup_description.py
+++ b/src/pysubgroup/subgroup_description.py
@@ -239,7 +239,10 @@ def from_str(s):
             try:
                 attribute_value = float(attribute_value)
             except ValueError:
-                pass
+                try:
+                    attribute_value = ps.str_to_bool(attribute_value)
+                except ValueError:
+                    pass
         return ps.EqualitySelector(attribute_name, attribute_value)
 
 
diff --git a/src/pysubgroup/utils.py b/src/pysubgroup/utils.py
index 51c45ea..4be5fc9 100644
--- a/src/pysubgroup/utils.py
+++ b/src/pysubgroup/utils.py
@@ -15,6 +15,16 @@
 from .algorithms import SubgroupDiscoveryTask
 
 
+def str_to_bool(s):
+    s = s.lower()
+    if s in ["y", "yes", "t", "true", "on", "1"]:
+        return True
+    elif s in ["n", "no", "f", "false", "off", "0"]:
+        return False
+
+    raise ValueError(f"'{s}' is not a valid string representation of a boolean value")
+
+
 def minimum_required_quality(result, task):
     if len(result) < task.result_set_size:
         return task.min_quality
diff --git a/tests/test_subgroup_description.py b/tests/test_subgroup_description.py
index 8aaee2a..be00c8b 100644
--- a/tests/test_subgroup_description.py
+++ b/tests/test_subgroup_description.py
@@ -134,10 +134,15 @@ def test_remove_target_attributes(self):
         self.assertEqual(selectors[1:], bin_sel)
 
     def test_EqualitySelector_from_str(self):
-        selector1 = ps.EqualitySelector.from_str("A=='hello'")
-        selector2 = ps.EqualitySelector("A", "hello")
-        self.assertEqual(selector1, selector2)
-        self.assertIs(selector1, selector2)
+        def test_str(s, attribute_name, attribute_value):
+            selector = ps.EqualitySelector.from_str(s)
+            _selector = ps.EqualitySelector(attribute_name, attribute_value)
+            self.assertEqual(selector, _selector)
+            self.assertIs(selector, _selector)
+
+        test_str("A=='hello'", "A", "hello")
+        test_str("A==True", "A", True)
+        test_str("A==False", "A", False)
 
     def test_IntervalSelector_from_str(self):
         def test_str(s, attribute_name, lb, ub):