diff --git a/Cargo.lock b/Cargo.lock
index be6c367..bcfa370 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1549,7 +1549,7 @@ dependencies = [
 
 [[package]]
 name = "hyperware_process_lib"
-version = "1.0.5"
+version = "1.0.6"
 dependencies = [
  "alloy",
  "alloy-primitives",
diff --git a/Cargo.toml b/Cargo.toml
index 4fd1c75..ad382f6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "hyperware_process_lib"
 authors = ["Sybil Technologies AG"]
-version = "1.0.5"
+version = "1.0.6"
 edition = "2021"
 description = "A library for writing Hyperware processes in Rust."
 homepage = "https://hyperware.ai"
@@ -10,6 +10,7 @@ license = "Apache-2.0"
 
 [features]
 logging = ["dep:color-eyre", "dep:tracing", "dep:tracing-error", "dep:tracing-subscriber"]
+simulation-mode = []
 
 [dependencies]
 alloy-primitives = "0.8.15"
diff --git a/src/hypermap.rs b/src/hypermap.rs
index 7ad150a..a7c3c29 100644
--- a/src/hypermap.rs
+++ b/src/hypermap.rs
@@ -14,9 +14,15 @@ use std::str::FromStr;
 /// hypermap deployment address on base
 pub const HYPERMAP_ADDRESS: &'static str = "0x000000000044C6B8Cb4d8f0F889a3E47664EAeda";
 /// base chain id
-pub const HYPERMAP_CHAIN_ID: u64 = 8453;
+#[cfg(not(feature = "simulation-mode"))]
+pub const HYPERMAP_CHAIN_ID: u64 = 8453; // base
+#[cfg(feature = "simulation-mode")]
+pub const HYPERMAP_CHAIN_ID: u64 = 31337; // fakenet
 /// first block (minus one) of hypermap deployment on base
+#[cfg(not(feature = "simulation-mode"))]
 pub const HYPERMAP_FIRST_BLOCK: u64 = 27_270_411;
+#[cfg(feature = "simulation-mode")]
+pub const HYPERMAP_FIRST_BLOCK: u64 = 0;
 /// the root hash of hypermap, empty bytes32
 pub const HYPERMAP_ROOT_HASH: &'static str =
     "0x0000000000000000000000000000000000000000000000000000000000000000";