diff --git a/Cargo.toml b/Cargo.toml
index 9ab5dbe..fa4835b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,8 +15,8 @@ repository = "https://github.com/init4tech/bin-base"
 init4-from-env-derive =  "0.1.0"
 
 # Signet
-signet-constants = { version = "0.16.0-rc.4" }
-signet-tx-cache = { version = "0.16.0-rc.4", optional = true }
+signet-constants = { version = "0.16.0-rc.7" }
+signet-tx-cache = { version = "0.16.0-rc.7", optional = true }
 
 # alloy
 alloy = { version = "1.0.35", optional = true, default-features = false, features = ["std", "signer-local", "consensus", "network"] }
@@ -92,4 +92,4 @@ required-features = ["perms"]
 # signet-extract = { path = "../sdk/crates/extract"}
 # signet-tx-cache = { path = "../sdk/crates/tx-cache"}
 # signet-types = { path = "../sdk/crates/types"}
-# signet-zenith = { path = "../sdk/crates/zenith"}
\ No newline at end of file
+# signet-zenith = { path = "../sdk/crates/zenith"}
diff --git a/src/utils/calc.rs b/src/utils/calc.rs
index 5cb5754..f9be097 100644
--- a/src/utils/calc.rs
+++ b/src/utils/calc.rs
@@ -1,5 +1,6 @@
 use crate::utils::from_env::{EnvItemInfo, FromEnv, FromEnvErr, FromEnvVar};
-use signet_constants::KnownChains;
+#[allow(deprecated)]
+use signet_constants::{mainnet, parmigiana, pecorino, test_utils, KnownChains};
 use std::{num::ParseIntError, str::FromStr};
 
 /// A slot calculator, which can calculate slot numbers, windows, and offsets
@@ -95,27 +96,32 @@ impl SlotCalculator {
     /// Create a new slot calculator for Parmigiana host network.
     pub const fn parmigiana_host() -> Self {
         Self {
-            start_timestamp: 1765226348,
-            slot_offset: 0,
-            slot_duration: 12,
+            start_timestamp: parmigiana::HOST_START_TIMESTAMP,
+            slot_offset: parmigiana::HOST_SLOT_OFFSET as usize,
+            slot_duration: parmigiana::HOST_SLOT_DURATION,
         }
     }
 
     /// Create a new slot calculator for Pecorino host network.
+    #[deprecated(note = "Pecorino is being deprecated in favor of Parmigiana")]
+    #[expect(
+        deprecated,
+        reason = "This deprecated function consumes deprecated consts"
+    )]
     pub const fn pecorino_host() -> Self {
         Self {
-            start_timestamp: 1754584265,
-            slot_offset: 0,
-            slot_duration: 12,
+            start_timestamp: pecorino::HOST_START_TIMESTAMP,
+            slot_offset: pecorino::HOST_SLOT_OFFSET as usize,
+            slot_duration: pecorino::HOST_SLOT_DURATION,
         }
     }
 
     /// Create a new slot calculator for Ethereum mainnet.
     pub const fn mainnet() -> Self {
         Self {
-            start_timestamp: 1663224179,
-            slot_offset: 4700013,
-            slot_duration: 12,
+            start_timestamp: mainnet::HOST_START_TIMESTAMP,
+            slot_offset: mainnet::HOST_SLOT_OFFSET as usize,
+            slot_duration: mainnet::HOST_SLOT_DURATION,
         }
     }
 
@@ -338,7 +344,11 @@ impl From<KnownChains> for SlotCalculator {
             KnownChains::Parmigiana => SlotCalculator::parmigiana_host(),
             #[allow(deprecated)]
             KnownChains::Pecorino => SlotCalculator::pecorino_host(),
-            KnownChains::Test => SlotCalculator::new(12, 0, 12),
+            KnownChains::Test => SlotCalculator::new(
+                test_utils::HOST_START_TIMESTAMP,
+                test_utils::HOST_SLOT_OFFSET as usize,
+                test_utils::HOST_SLOT_DURATION,
+            ),
         }
     }
 }