diff --git a/src/ampform/helicity/__init__.py b/src/ampform/helicity/__init__.py
index 03f96f39..b03fc187 100644
--- a/src/ampform/helicity/__init__.py
+++ b/src/ampform/helicity/__init__.py
@@ -61,10 +61,10 @@
 from ampform.sympy import PoolSum, determine_indices
 from ampform.sympy._array_expressions import ArraySum
 
-if sys.version_info < (3, 12):
-    from typing_extensions import override
-else:
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from collections.abc import (
         ItemsView,
diff --git a/src/ampform/helicity/decay.py b/src/ampform/helicity/decay.py
index 790e753e..942f3877 100644
--- a/src/ampform/helicity/decay.py
+++ b/src/ampform/helicity/decay.py
@@ -20,10 +20,10 @@
 
 from typing import Literal
 
-if sys.version_info < (3, 10):
-    from typing_extensions import TypeGuard
-else:
+if sys.version_info >= (3, 10):
     from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard
 
 
 @frozen
diff --git a/src/ampform/helicity/naming.py b/src/ampform/helicity/naming.py
index 999e5fdb..9cdaff65 100644
--- a/src/ampform/helicity/naming.py
+++ b/src/ampform/helicity/naming.py
@@ -21,10 +21,10 @@
     group_by_spin_projection,
 )
 
-if sys.version_info < (3, 12):
-    from typing_extensions import override
-else:
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from collections.abc import Iterable
 
diff --git a/src/ampform/kinematics/lorentz.py b/src/ampform/kinematics/lorentz.py
index 9ba678fc..2991e86d 100644
--- a/src/ampform/kinematics/lorentz.py
+++ b/src/ampform/kinematics/lorentz.py
@@ -18,10 +18,10 @@
 )
 from ampform.sympy.math import ComplexSqrt
 
-if sys.version_info < (3, 10):
-    from typing_extensions import TypeAlias
-else:
+if sys.version_info >= (3, 10):
     from typing import TypeAlias
+else:
+    from typing_extensions import TypeAlias
 if TYPE_CHECKING:
     from qrules.topology import Topology
     from sympy.printing.latex import LatexPrinter
diff --git a/src/ampform/sympy/__init__.py b/src/ampform/sympy/__init__.py
index c3e4e1cf..845d4caf 100644
--- a/src/ampform/sympy/__init__.py
+++ b/src/ampform/sympy/__init__.py
@@ -43,14 +43,14 @@
     make_commutative,  # pyright: ignore[reportUnusedImport]  # noqa: F401
 )
 
-if sys.version_info < (3, 11):
-    from typing_extensions import Self
-else:
+if sys.version_info >= (3, 11):
     from typing import Self
-if sys.version_info < (3, 12):
-    from typing_extensions import override
 else:
+    from typing_extensions import Self
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from collections.abc import Iterable, Sequence
 
diff --git a/src/ampform/sympy/_array_expressions.py b/src/ampform/sympy/_array_expressions.py
index 4beedb00..d8cb8343 100644
--- a/src/ampform/sympy/_array_expressions.py
+++ b/src/ampform/sympy/_array_expressions.py
@@ -27,14 +27,14 @@
     get_shape,
 )
 
-if sys.version_info < (3, 11):
-    from typing_extensions import Self
-else:
+if sys.version_info >= (3, 11):
     from typing import Self
-if sys.version_info < (3, 12):
-    from typing_extensions import override
 else:
+    from typing_extensions import Self
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from collections.abc import Iterable
 
diff --git a/src/ampform/sympy/_decorator.py b/src/ampform/sympy/_decorator.py
index 51a55be9..64c5c5c1 100644
--- a/src/ampform/sympy/_decorator.py
+++ b/src/ampform/sympy/_decorator.py
@@ -19,20 +19,20 @@
 from sympy.core.basic import _aresame  # noqa: PLC2701
 from sympy.utilities.exceptions import SymPyDeprecationWarning
 
-if sys.version_info < (3, 11):
-    from typing_extensions import dataclass_transform
-else:
+if sys.version_info >= (3, 11):
     from typing import dataclass_transform
+else:
+    from typing_extensions import dataclass_transform
 
 if TYPE_CHECKING:
     from collections.abc import Hashable, Iterable
 
     from sympy.printing.latex import LatexPrinter
 
-    if sys.version_info < (3, 11):
-        from typing_extensions import ParamSpec, Unpack
-    else:
+    if sys.version_info >= (3, 11):
         from typing import ParamSpec, Unpack
+    else:
+        from typing_extensions import ParamSpec, Unpack
 
     H = TypeVar("H", bound=Hashable)
     P = ParamSpec("P")
diff --git a/src/ampform/sympy/deprecated.py b/src/ampform/sympy/deprecated.py
index 9f458efd..a4a6621d 100644
--- a/src/ampform/sympy/deprecated.py
+++ b/src/ampform/sympy/deprecated.py
@@ -13,10 +13,10 @@
 
 import sympy as sp
 
-if sys.version_info < (3, 12):
-    from typing_extensions import override
-else:
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from sympy.printing.latex import LatexPrinter
 
diff --git a/src/ampform/sympy/math.py b/src/ampform/sympy/math.py
index 34afda9a..9d676548 100644
--- a/src/ampform/sympy/math.py
+++ b/src/ampform/sympy/math.py
@@ -11,10 +11,10 @@
 
 from ampform.sympy import NumPyPrintable
 
-if sys.version_info < (3, 12):
-    from typing_extensions import override
-else:
+if sys.version_info >= (3, 12):
     from typing import override
+else:
+    from typing_extensions import override
 if TYPE_CHECKING:
     from sympy.printing.numpy import NumPyPrinter
     from sympy.printing.printer import Printer