diff --git a/.github/workflows/pytest-core-nompi.yaml b/.github/workflows/pytest-core-nompi.yaml
index 19c2379b9f..9b75ac714d 100644
--- a/.github/workflows/pytest-core-nompi.yaml
+++ b/.github/workflows/pytest-core-nompi.yaml
@@ -46,6 +46,7 @@ jobs:
            pytest-ubuntu-py313-gcc14-omp
         ]
         set: [base, adjoint]
+
         include:
         - name: pytest-ubuntu-py311-gcc11-cxxnoomp
           python-version: '3.11'
@@ -188,6 +189,10 @@ jobs:
         python3 -m pip install ${{ env.PIPFLAGS }} -e ".[tests,extras]"
         python3 -m pip install ${{ env.PIPFLAGS }} sympy==${{matrix.sympy}}
 
+    - name: Backward compat for numpy 1.26
+      if: matrix.name == 'pytest-ubuntu-py310-gcc14-omp'
+      run: python3 -m pip install ${{ env.PIPFLAGS }} numpy==1.26
+
     - name: Check Docker image Python version
       if: "contains(matrix.name, 'docker')"
       run: |
diff --git a/devito/ir/support/guards.py b/devito/ir/support/guards.py
index dbb1fe9ca7..cb961e7d46 100644
--- a/devito/ir/support/guards.py
+++ b/devito/ir/support/guards.py
@@ -354,7 +354,7 @@ class GuardExpr(LocalObject, BooleanFunction):
     it is defined.
     """
 
-    dtype = np.bool
+    dtype = np.bool_
 
     def __init__(self, name, liveness='eager', **kwargs):
         super().__init__(name, liveness=liveness, **kwargs)
diff --git a/requirements.txt b/requirements.txt
index 3d6838202d..87b29dac9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 pip>=9.0.1
-numpy>=2,<=2.3.3
+numpy>=1.26,<=2.4.3
 sympy>=1.12.1,<1.15
 psutil>=5.1.0,<8.0
 py-cpuinfo<10
diff --git a/tests/test_symbolics.py b/tests/test_symbolics.py
index 85d2818940..d799c68e64 100644
--- a/tests/test_symbolics.py
+++ b/tests/test_symbolics.py
@@ -881,7 +881,7 @@ def test_reduce_to_number(self):
 
         w_sub = uxreplace(w_lowered, {h_x: Number(3)})
 
-        assert np.isclose(w_sub, -0.003935689)
+        assert np.isclose(float(w_sub), -0.003935689)
         assert not w_sub.is_Mul
         assert w_sub.is_Number