diff --git a/conanfile.py b/conanfile.py
index 9efc429..e2aa5e3 100644
--- a/conanfile.py
+++ b/conanfile.py
@@ -26,7 +26,7 @@ class libhal___device___conan(ConanFile):
     topics = ("__device__", "libhal", "driver")
     settings = "compiler", "build_type", "os", "arch"
 
-    python_requires = "libhal-bootstrap/[^4.0.0]"
+    python_requires = "libhal-bootstrap/[^4.2.1]"
     python_requires_extend = "libhal-bootstrap.library"
 
     def requirements(self):
diff --git a/demos/conanfile.py b/demos/conanfile.py
index 11cd04f..790e027 100644
--- a/demos/conanfile.py
+++ b/demos/conanfile.py
@@ -15,7 +15,7 @@
 
 
 class demos(ConanFile):
-    python_requires = "libhal-bootstrap/[^4.0.0]"
+    python_requires = "libhal-bootstrap/[^4.2.1]"
     python_requires_extend = "libhal-bootstrap.demo"
 
     def requirements(self):
diff --git a/test_package/conanfile.py b/test_package/conanfile.py
index ad581a2..afb69c8 100644
--- a/test_package/conanfile.py
+++ b/test_package/conanfile.py
@@ -17,7 +17,7 @@
 
 class TestPackageConan(ConanFile):
     settings = "os", "arch", "compiler", "build_type"
-    python_requires = "libhal-bootstrap/[^4.0.0]"
+    python_requires = "libhal-bootstrap/[^4.2.1]"
     python_requires_extend = "libhal-bootstrap.library_test_package"
 
     def requirements(self):