diff --git a/perconet/__init__.py b/perconet/__init__.py
index 4b79ada..31828de 100644
--- a/perconet/__init__.py
+++ b/perconet/__init__.py
@@ -30,4 +30,4 @@
 
 __all__ = ["PeriodicNetwork", "LoopFinder"]
 
-__version__ = "0.2.3"
+__version__ = "0.2.4"
diff --git a/perconet/periodicnetwork.py b/perconet/periodicnetwork.py
index fa8f8b4..eaeaee5 100644
--- a/perconet/periodicnetwork.py
+++ b/perconet/periodicnetwork.py
@@ -329,7 +329,7 @@ def nodeid_to_clusterid(self, clusterlabels):
                 # using the addition operator
                 edgedata = connected_labels + self.simple_boundary_crossing[edge]
                 reduced_network.append(edgedata)
-        reduced_network = np.asarray(reduced_network)
+        reduced_network = np.asarray(reduced_network, dtype=int)
         # The main reason to collect the edge data in a 5-column numpy array is
         # that we can now use np.unique to get rid of duplicate edges
         reduced_network = np.unique(reduced_network, axis=0)
diff --git a/pyproject.toml b/pyproject.toml
index 1bd6c78..efa1d08 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "perconet"
-version = "0.2.3"
+version = "0.2.4"
 description = "Analyze percolation properties of periodic networks"
 authors = ["Chiara Raffaelli, Wouter G. Ellenbroek"]
 homepage = "https://github.com/wouterel/perconet"