diff --git a/requirements-test.in b/requirements-test.in
index 1b33834..9d355d8 100644
--- a/requirements-test.in
+++ b/requirements-test.in
@@ -13,6 +13,7 @@
 #     limitations under the License.
 
 asynctest
+charset-normalizer<3 # Required by aiohttp in LCM
 coverage
 flake8<5.0.0
 mock
diff --git a/requirements-test.txt b/requirements-test.txt
index 9eaa640..3d3325c 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -18,8 +18,10 @@
     # via -r requirements-test.in
 certifi==2022.12.7
     # via requests
-charset-normalizer==3.0.1
-    # via requests
+charset-normalizer==2.1.1
+    # via
+    #   -r requirements-test.in
+    #   requests
 coverage==7.1.0
     # via -r requirements-test.in
 flake8==4.0.1