diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e7e49e..d44f483 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,9 @@
 # CHANGELOG
 
 **v0.4.2:**
-- Fix u64 overflow
+- Fix u64 overflow panic [[PR #5](https://github.com/sqids/sqids-rust/pull/7)]
+- Cargo update
+- `cargo deny` update
 
 **v0.4.1:**
 - Derive `Clone` trait [[PR #6](https://github.com/sqids/sqids-rust/pull/6)]
diff --git a/Cargo.toml b/Cargo.toml
index b469efd..d1c7460 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 keywords = ["ids", "encode", "short", "sqids", "hashids"]
 
 [dependencies]
-derive_builder = "0.20.0"
-serde = "1.0.197"
-serde_json = "1.0.114"
-thiserror = "1.0.57"
+derive_builder = "0.20.2"
+serde = "1.0.216"
+serde_json = "1.0.133"
+thiserror = "2.0.8"
diff --git a/deny.toml b/deny.toml
index 6427659..f08bd99 100644
--- a/deny.toml
+++ b/deny.toml
@@ -1,36 +1,27 @@
-targets = [
-    { triple = "x86_64-unknown-linux-gnu" },
-    { triple = "aarch64-unknown-linux-gnu" },
-    { triple = "x86_64-unknown-linux-musl" },
-    { triple = "aarch64-apple-darwin" },
-    { triple = "x86_64-apple-darwin" },
-    { triple = "x86_64-pc-windows-msvc" },
-]
+[graph]
+all-features = true
 
 [advisories]
-vulnerability = "deny"
-unmaintained = "warn"
-unsound = "deny"
-yanked = "deny"
-notice = "warn"
+version = 2
 ignore = []
 
 [licenses]
-unlicensed = "deny"
-allow-osi-fsf-free = "either"
-copyleft = "deny"
-default = "warn"
-unused-allowed-license = "deny"
-confidence-threshold = 0.95
-allow = []
-exceptions = []
+version = 2
+allow = [
+    "MIT",
+    "Apache-2.0",
+    "Unicode-3.0"
+]
 
-[sources]
-unknown-registry = "deny"
-unknown-git = "deny"
+exceptions = []
 
 [bans]
 multiple-versions = "allow"
 wildcards = "deny"
-highlight = "simplest-path"
-skip-tree = []
+deny = []
+
+[sources]
+unknown-registry = "deny"
+unknown-git = "deny"
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+allow-git = []
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index f16f0bd..8dac92c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -335,18 +335,24 @@ impl Sqids {
 	}
 
 	fn to_number(&self, id: &str, alphabet: &[char]) -> Option<u64> {
-		let mut result = 0;
+		let mut result: u64 = 0;
+		let base = alphabet.len() as u64;
 
 		for c in id.chars() {
-			let idx = alphabet.iter().position(|&x| x == c).unwrap();
-			result = result * alphabet.len() as u128 + idx as u128;
-		}
+			let idx = alphabet.iter().position(|&x| x == c).unwrap() as u64;
 
-		if result <= u64::MAX.into() {
-			Some(result.try_into().unwrap())
-		} else {
-			None
+			if let Some(new_result) = result.checked_mul(base) {
+				if let Some(final_result) = new_result.checked_add(idx) {
+					result = final_result;
+				} else {
+					return None;
+				}
+			} else {
+				return None;
+			}
 		}
+
+		Some(result)
 	}
 
 	fn shuffle(alphabet: &[char]) -> Vec<char> {
diff --git a/tests/decoding.rs b/tests/decoding.rs
deleted file mode 100644
index ce3d1b7..0000000
--- a/tests/decoding.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-use sqids::*;
-
-#[test]
-fn decode_number_maximum_value() {
-	let sqids = Sqids::default();
-	let numbers = sqids.decode("ABARpJzdz9");
-	assert_eq!(numbers, [9_007_199_254_740_991]); // 2 ^ 53
-}
-
-#[test]
-fn decode_number_overflows() {
-	let sqids = Sqids::default();
-	let numbers = sqids.decode("0J4AEXRN106Z0");
-	assert_eq!(numbers, Vec::<u64>::new());
-}
diff --git a/tests/encoding.rs b/tests/encoding.rs
index d6d70d5..9aace8e 100644
--- a/tests/encoding.rs
+++ b/tests/encoding.rs
@@ -118,3 +118,17 @@ fn decoding_invalid_character() {
 	let numbers: Vec<u64> = vec![];
 	assert_eq!(sqids.decode("*"), numbers);
 }
+
+#[test]
+fn decoding_number_maximum_value() {
+	let sqids = Sqids::default();
+	let numbers = sqids.decode("ABARpJzdz9");
+	assert_eq!(numbers, [9_007_199_254_740_991]); // 2 ^ 53
+}
+
+#[test]
+fn decoding_number_overflows() {
+	let sqids = Sqids::default();
+	let numbers = sqids.decode("0J4AEXRN106Z0"); // `https://github.com/sqids/sqids-rust/pull/7`
+	assert_eq!(numbers, Vec::<u64>::new());
+}