diff --git a/.env.sepolia b/.env.sepolia
index e518129fb..64c3f271c 100644
--- a/.env.sepolia
+++ b/.env.sepolia
@@ -19,7 +19,7 @@ BASE_NODE_L1_TRUST_RPC="false"
 
 # ENGINE CONFIGURATION
 # --------------------
-BASE_NODE_L2_ENGINE_RPC=http://execution:8551
+BASE_NODE_L2_ENGINE_RPC=ws://execution:8551
 BASE_NODE_L2_ENGINE_AUTH=/tmp/engine-auth-jwt
 BASE_NODE_L2_ENGINE_AUTH_RAW=688f5d737bad920bdfb2fc2f488d6b6209eebda1dae949a8de91398d932c517a