diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e61c05f4..8f42cbda 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -66,7 +66,7 @@ jobs:
 
       - name: Install openwisp-network-topology
         run: |
-          pip install -e .
+          pip install -U -e .
           pip install ${{ matrix.django-version }}
 
       - name: QA checks
diff --git a/openwisp_network_topology/integrations/device/base/models.py b/openwisp_network_topology/integrations/device/base/models.py
index c3953723..99ff4b14 100644
--- a/openwisp_network_topology/integrations/device/base/models.py
+++ b/openwisp_network_topology/integrations/device/base/models.py
@@ -109,14 +109,7 @@ def auto_create_wireguard(cls, node):
         ip_addresses = []
         for ip in allowed_ips:
             try:
-                network = ip_network(ip)
-                if network.prefixlen == network._max_prefixlen:
-                    # In python 3.7, hosts method is not returning any ip
-                    # if subnet mask is 32, resolved in future python releases
-                    # https://bugs.python.org/issue28577
-                    ip_addresses.append(str(network.network_address))
-                else:
-                    ip_addresses.extend([str(host) for host in ip_network(ip).hosts()])
+                ip_addresses.extend([str(host) for host in ip_network(ip).hosts()])
             except ValueError:
                 # invalid IP address
                 continue
diff --git a/requirements-test.txt b/requirements-test.txt
index a6f894ff..60d86163 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,5 +1,5 @@
-responses~=0.16.0
-pytest-asyncio~=0.14.0
+responses~=0.23.1
+pytest-asyncio~=0.21.0
 pytest-django~=4.5.2
 freezegun~=1.1.0
 # Needed to test integrations
diff --git a/requirements.txt b/requirements.txt
index a54a475e..1ea3fbff 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-django>=3.0,<4.1
 openwisp-users @ https://github.com/openwisp/openwisp-users/tarball/master
 netdiff @ https://github.com/openwisp/netdiff/tarball/master
 jsonfield~=3.1.0