diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7fffa06..3d82b9e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: "ubuntu-latest"
     strategy:
       matrix:
-        rust-version: ["1.84.1", "stable"]
+        rust-version: ["1.87.0", "stable"]
     steps:
       - uses: "actions/checkout@v4.2.2"
 
diff --git a/Cargo.toml b/Cargo.toml
index c52a2d1..921b867 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,8 +5,8 @@ resolver = "2"
 [workspace.package]
 # name = "advent_of_code"
 version = "1.0.0"
-edition = "2021"
-rust-version = "1.84.1"
+edition = "2024"
+rust-version = "1.87.0"
 
 [workspace.dependencies]
 rayon = { version = "=1.10.0" }
diff --git a/README.md b/README.md
index b347319..95e9e67 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
 
 The project is **tested** against the following [Rust](https://www.rust-lang.org/) versions:
 
-- **Minimum Supported Rust Version (MSRV): v1.84.1**
+- **Minimum Supported Rust Version (MSRV): v1.87.0**
 - **Latest Stable Version**
 
 ## Usage
diff --git a/advent_2023/puzzle_2023_day_6/src/lib.rs b/advent_2023/puzzle_2023_day_6/src/lib.rs
index 0392a61..0638608 100644
--- a/advent_2023/puzzle_2023_day_6/src/lib.rs
+++ b/advent_2023/puzzle_2023_day_6/src/lib.rs
@@ -39,7 +39,7 @@ impl RaceStrategy {
 pub fn part_1(input: &str) -> usize {
     fn get_numbers_from_line(line: &str) -> Vec<usize> {
         line.split(':')
-            .last()
+            .next_back()
             .unwrap_or_default()
             .split_ascii_whitespace()
             .map(|value| value.trim())
@@ -70,7 +70,7 @@ pub fn part_1(input: &str) -> usize {
 pub fn part_2(input: &str) -> usize {
     fn get_number_from_line(line: &str) -> usize {
         line.split(':')
-            .last()
+            .next_back()
             .unwrap_or_default()
             .replace(' ', "")
             .trim()