diff --git a/Cross.toml b/Cross.toml
index c65b3608..e7d99827 100644
--- a/Cross.toml
+++ b/Cross.toml
@@ -1,6 +1,6 @@
 [build]
 pre-build = [
-    "apt-get update && apt-get -y upgrade && apt-get install -y wget pkg-config llvm-dev libclang-6.0-dev clang-6.0 libssl-dev",
+    "apt-get update && apt-get -y upgrade && apt-get install -y wget pkg-config llvm-dev libclang-6.0-dev clang-6.0 libssl-dev ca-certificates",
     "wget -c https://github.com/ethereum/solidity/releases/download/v0.8.20/solc-static-linux && mv solc-static-linux /usr/local/bin/solc && chmod a+x /usr/local/bin/solc"
 ]
 
diff --git a/bin/silius/src/bundler.rs b/bin/silius/src/bundler.rs
index 2257009b..7cc9ec29 100644
--- a/bin/silius/src/bundler.rs
+++ b/bin/silius/src/bundler.rs
@@ -542,7 +542,7 @@ where
     if let Some(chain) = chain {
         if !CHAINS.contains(&chain) {
             warn!("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
-            warn!("Chain {:?} is not officially supported yet! You could possibly meet a lot of problems with silius. Use at your own risk!!", chain);
+            warn!("Chain {:?} is not officially supported yet! You could possibly meet a lot of problems with Silius. Use at your own risk!", chain);
             warn!("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
         }
 
diff --git a/crates/mempool/src/validate/sanity/sender.rs b/crates/mempool/src/validate/sanity/sender.rs
index d84005e5..dc909813 100644
--- a/crates/mempool/src/validate/sanity/sender.rs
+++ b/crates/mempool/src/validate/sanity/sender.rs
@@ -51,11 +51,15 @@ impl<M: Middleware> SanityCheck<M> for Sender {
             return Ok(());
         }
 
-        let uo_prev = mempool
-            .get_all_by_sender(&uo.sender)
-            .iter()
-            .find(|uo_prev| uo_prev.nonce == uo.nonce)
-            .cloned();
+        let mut uo_prev: Option<UserOperation> = None;
+
+        if !helper.val_config.ignore_prev {
+            uo_prev = mempool
+                .get_all_by_sender(&uo.sender)
+                .iter()
+                .find(|uo_prev| uo_prev.nonce == uo.nonce)
+                .cloned();
+        }
 
         if let Some(uo_prev) = uo_prev {
             if uo.max_fee_per_gas <
diff --git a/crates/mempool/src/validate/validator.rs b/crates/mempool/src/validate/validator.rs
index 5f660a3e..53ae1677 100644
--- a/crates/mempool/src/validate/validator.rs
+++ b/crates/mempool/src/validate/validator.rs
@@ -251,6 +251,7 @@ where
                 min_stake: Some(reputation.min_stake()),
                 min_unstake_delay: Some(reputation.min_unstake_delay()),
                 topic: None,
+                ignore_prev: false,
             };
         }
 
@@ -269,6 +270,7 @@ where
         if let Some(uo) = mempool.get_prev_by_sender(uo) {
             out.prev_hash = Some(uo.hash);
         }
+
         debug!("Simulate user operation from {:?}", uo.sender);
         let sim_res = self.simulate_validation(uo).await?;
 
diff --git a/crates/p2p/src/service/mod.rs b/crates/p2p/src/service/mod.rs
index 02248dcf..0548d1d0 100644
--- a/crates/p2p/src/service/mod.rs
+++ b/crates/p2p/src/service/mod.rs
@@ -304,6 +304,7 @@ impl Network {
                                             min_stake: Some(canonical_mempool_config.min_stake),
                                             min_unstake_delay: None,
                                             topic: Some(message.topic.to_string()),
+                                            ignore_prev: false,
                                         }
                                     })
                                     .expect("mempool channel should be open all the time");
@@ -424,7 +425,7 @@ impl Network {
                         verified_at_block_hash,
                         validation_config,
                     } => {
-                        info!("Received user {user_operation:?} from ep {ep:?} verified in {verified_at_block_hash:?} to gossip over p2p!");
+                        info!("Received user operation (verified at {verified_at_block_hash:?}) to gossip over p2p: {user_operation:?}");
 
                         let user_op = VerifiedUserOperation::new(
                             user_operation.user_operation.clone(),
@@ -444,6 +445,7 @@ impl Network {
                                         min_stake: Some(first_mempool_config.min_stake),
                                         min_unstake_delay: None,
                                         topic: Some(first_mempool_topic.to_string()),
+                                        ignore_prev: true,
                                     },
                                 })
                                 .expect("mempool channel should be open all the time");
@@ -463,6 +465,7 @@ impl Network {
                                             min_stake: Some(canonical_mempool_config.min_stake),
                                             min_unstake_delay: None,
                                             topic: Some(canonical_mempool_topic.to_string()),
+                                            ignore_prev: true,
                                         },
                                     })
                                     .expect("mempool channel should be open all the time");
diff --git a/crates/primitives/src/simulation.rs b/crates/primitives/src/simulation.rs
index f6e2be7d..4928d950 100644
--- a/crates/primitives/src/simulation.rs
+++ b/crates/primitives/src/simulation.rs
@@ -45,6 +45,7 @@ pub struct ValidationConfig {
     pub min_stake: Option<U256>,
     pub min_unstake_delay: Option<U256>,
     pub topic: Option<String>,
+    pub ignore_prev: bool,
 }
 
 /// Code hash - hash of the code of the contract