diff --git a/.azure/azure-ci-build-pipeline.yaml b/.azure/azure-ci-build-pipeline.yaml
index 9070270a..2b1af5f4 100644
--- a/.azure/azure-ci-build-pipeline.yaml
+++ b/.azure/azure-ci-build-pipeline.yaml
@@ -81,6 +81,17 @@ stages:
             displayName: 'Install PrimAITE'
             condition: eq( variables['Agent.OS'], 'Windows_NT' )
 
+          - script: |
+              GATE_WHEEL=$(ls ./GATE/arcd_gate*.whl)
+              python -m pip install GATE_WHEEL[dev]
+            displayName: 'Install GATE'
+            condition: or(eq( variables['Agent.OS'], 'Linux' ), eq( variables['Agent.OS'], 'Darwin' ))
+
+          - script: |
+              forfiles /p GATE\ /m *.whl /c "cmd /c python -m pip install @file[dev]"
+            displayName: 'Install GATE'
+            condition: eq( variables['Agent.OS'], 'Windows_NT' )
+
           - script: |
               primaite setup
             displayName: 'Perform PrimAITE Setup'
diff --git a/src/primaite/game/agent/observations.py b/src/primaite/game/agent/observations.py
index 8eb322bd..a3bafeea 100644
--- a/src/primaite/game/agent/observations.py
+++ b/src/primaite/game/agent/observations.py
@@ -585,7 +585,7 @@ class AclObservation(AbstractObservation):
         self,
         node_ip_to_id: Dict[str, int],
         ports: List[int],
-        protocols: list[str],
+        protocols: List[str],
         where: Optional[Tuple[str]] = None,
         num_rules: int = 10,
     ) -> None: