diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 568c286..1126ddd 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -9,7 +9,7 @@ jobs:
 
     strategy:
         matrix:
-            python-version: ["3.8", "3.9", "3.10"]
+            python-version: ["3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/netprobify/protocol/tcpsyn.py b/netprobify/protocol/tcpsyn.py
index 44c37a0..b568aea 100644
--- a/netprobify/protocol/tcpsyn.py
+++ b/netprobify/protocol/tcpsyn.py
@@ -335,7 +335,7 @@ def send_packets(self, res, logging_level, all_groups, verbose=0, force_raw_sock
                 packets[seq_acked][1] = pkt[1]
 
         # results analysis
-        for pkt_id in packets:
+        for pkt_id, _ in packets.items():
             sent_pkt = packets[pkt_id][0]
 
             # for each responses
diff --git a/requirements/netprobify.txt b/requirements/netprobify.txt
index 5c91a4a..0207964 100644
--- a/requirements/netprobify.txt
+++ b/requirements/netprobify.txt
@@ -18,6 +18,8 @@ flask-httpauth==4.8.0
     # via -r requirements/netprobify.in
 idna==3.10
     # via requests
+importlib-metadata==8.5.0
+    # via flask
 ipaddress==1.0.23
     # via ipam-client
 ipam-client==0.6.2
@@ -62,3 +64,5 @@ waitress==3.0.0
     # via -r requirements/netprobify.in
 werkzeug==3.0.4
     # via flask
+zipp==3.21.0
+    # via importlib-metadata
diff --git a/requirements/tests.in b/requirements/tests.in
index af84c64..3c367f7 100644
--- a/requirements/tests.in
+++ b/requirements/tests.in
@@ -3,4 +3,5 @@ pykwalify
 pylama
 pytest
 requests-mock
+ruff
 setuptools
diff --git a/requirements/tests.txt b/requirements/tests.txt
index 4ed39cf..b01e42e 100644
--- a/requirements/tests.txt
+++ b/requirements/tests.txt
@@ -42,6 +42,8 @@ ruamel-yaml==0.18.6
     # via pykwalify
 ruamel-yaml-clib==0.2.8
     # via ruamel-yaml
+ruff==0.8.3
+    # via -r requirements/tests.in
 setuptools==75.1.0
     # via -r requirements/tests.in
 six==1.16.0