diff --git a/.github/workflows/ci_checks.yml b/.github/workflows/ci_checks.yml
index f0bdb4c..5d0b3f8 100644
--- a/.github/workflows/ci_checks.yml
+++ b/.github/workflows/ci_checks.yml
@@ -6,8 +6,7 @@ jobs:
     strategy:
       max-parallel: 6
       matrix:
-        # python-version: ["3.8", "3.10", "3.13"]
-        python-version: ["3.13"]
+        python-version: ["3.10", "3.11", "3.13"]
         poetry-version: ["1.8"]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/ci_release.yml b/.github/workflows/ci_release.yml
index 1023c41..9a1c3be 100644
--- a/.github/workflows/ci_release.yml
+++ b/.github/workflows/ci_release.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10"]
+        python-version: ["3.11"]
         poetry-version: ["1.4"]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
diff --git a/gym_anm/simulator/solve_load_flow.py b/gym_anm/simulator/solve_load_flow.py
index 66158d6..92f25ec 100644
--- a/gym_anm/simulator/solve_load_flow.py
+++ b/gym_anm/simulator/solve_load_flow.py
@@ -213,13 +213,13 @@ def _newton_raphson_sparse(v_guess, p, q, Y, x_tol=1e-10, lim_iter=100):
 
     n_iter = 0
     F = _f(v_guess, p, q, Y)
-    diff = norm(F, np.Inf)
+    diff = norm(F, np.inf)
 
     while diff > x_tol and n_iter < lim_iter:
         n_iter += 1
         v_guess = v_guess - spsolve(_dfdx(v_guess, Y), F)
         F = _f(v_guess, p, q, Y)
-        diff = norm(F, np.Inf)
+        diff = norm(F, np.inf)
 
     converged = False if np.isnan(diff) else True