diff --git a/docs/changes/979.bugfix.rst b/docs/changes/979.bugfix.rst
new file mode 100644
index 000000000..f758c05a9
--- /dev/null
+++ b/docs/changes/979.bugfix.rst
@@ -0,0 +1 @@
+Stingray can now be imported with newer Numba versions that no longer accept ``bool(...)`` in vectorized function signatures.
diff --git a/stingray/fourier.py b/stingray/fourier.py
index 00de2eae3..8a40834ef 100644
--- a/stingray/fourier.py
+++ b/stingray/fourier.py
@@ -23,6 +23,9 @@
     rebin_data,
     njit,
     vectorize,
+    boolean,
+    float64,
+    int64,
 )
 
 
@@ -979,8 +982,8 @@ def _intrinsic_coherence_uncertainties(
 
 @vectorize(
     [
-        "bool(float64, float64, float64, float64, int64, float64)",
-        "bool(float64, float64, float64, float64, float64, float64)",
+        boolean(float64, float64, float64, float64, int64, float64),
+        boolean(float64, float64, float64, float64, float64, float64),
     ],
     nopython=True,
 )
diff --git a/stingray/tests/test_fourier.py b/stingray/tests/test_fourier.py
index 13d9c8c9b..138508887 100644
--- a/stingray/tests/test_fourier.py
+++ b/stingray/tests/test_fourier.py
@@ -316,6 +316,9 @@ def test_check_powers_for_intrinsic_coherence(self):
         res = check_powers_for_intrinsic_coherence(pow1, pow2, pow1_noise, pow2_noise, n_ave, 3.0)
         assert np.all(res == np.array([True, False, False]))
 
+        scalar_res = check_powers_for_intrinsic_coherence(10, 10, pow1_noise, pow2_noise, 1, 3.0)
+        assert scalar_res is True or scalar_res == np.bool_(True)
+
 
 class TestFourier(object):
     @classmethod
diff --git a/stingray/utils.py b/stingray/utils.py
index fc4eb923b..d2263ea68 100644
--- a/stingray/utils.py
+++ b/stingray/utils.py
@@ -77,14 +77,14 @@ def decorator(func, *a, **kw):
     def generic(*args, **kwargs):
         return None
 
-    float32 = float64 = int32 = int64 = generic
+    float32 = float64 = int32 = int64 = boolean = generic
 
     def prange(x):
         return range(x)
 
 
 if HAS_NUMBA:
-    from numba import njit, prange, vectorize, float32, float64, int32, int64
+    from numba import njit, prange, vectorize, float32, float64, int32, int64, boolean
 
     from numba.core.errors import NumbaValueError, NumbaNotImplementedError, TypingError