diff --git a/infrastructure/cloudformation/dt/load_balancing.yaml b/infrastructure/cloudformation/dt/load_balancing.yaml
index 3c4a1bf..471b2f8 100644
--- a/infrastructure/cloudformation/dt/load_balancing.yaml
+++ b/infrastructure/cloudformation/dt/load_balancing.yaml
@@ -38,7 +38,7 @@ Resources:
     Type: AWS::ElasticLoadBalancingV2::TargetGroup
     Properties:
       Port: 7777
-      Protocol: UDP
+      Protocol: TCP_UDP
       TargetGroupAttributes:
         - Key: deregistration_delay.timeout_seconds
           Value: '20'
@@ -55,7 +55,7 @@ Resources:
           TargetGroupArn: !Ref NlbTargetGroup
       LoadBalancerArn: !Ref PublicNLB
       Port: 7777
-      Protocol: UDP
+      Protocol: TCP_UDP
 
 
 Outputs: