diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 265a95e..8bba03e 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -15,10 +15,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.10
+      - name: Set up Python 3.11
         uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.11"
           cache: "pip"
           cache-dependency-path: "**/pyproject.toml"
       - name: Install build dependencies
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 75752cc..d8bb12a 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -24,9 +24,9 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            python: "3.9"
+            python: "3.10"
           - os: ubuntu-latest
-            python: "3.11"
+            python: "3.12"
 
     name: ${{ matrix.name }} Python ${{ matrix.python }}
 
diff --git a/src/pycea/tl/distance.py b/src/pycea/tl/distance.py
index 7bd8438..718bfc2 100755
--- a/src/pycea/tl/distance.py
+++ b/src/pycea/tl/distance.py
@@ -130,7 +130,7 @@ def distance(
         pairs = _sample_pairs(pairs, sample_n, tdata.n_obs)
         # Compute distances
         distances = [metric_fn.pairwise(X[i : i + 1, :], X[j : j + 1, :])[0, 0] for i, j in pairs]
-        distances = sp.sparse.csr_matrix((distances, zip(*pairs)), shape=(tdata.n_obs, tdata.n_obs))
+        distances = sp.sparse.csr_matrix((distances, tuple(map(list, zip(*pairs)))), shape=(tdata.n_obs, tdata.n_obs))
     # Distance given indices
     elif obs is None or (isinstance(obs, Sequence) and isinstance(obs[0], str)):
         if obs is None: