diff --git a/.github/workflows/build_and_test.yml b/.github/workflows/build_and_test.yml
index afe7899..dfee8b3 100644
--- a/.github/workflows/build_and_test.yml
+++ b/.github/workflows/build_and_test.yml
@@ -8,7 +8,7 @@ env:
 jobs:
   check:
     name: Check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
@@ -30,7 +30,7 @@ jobs:
 
   lints:
     name: Lints
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
@@ -79,4 +79,4 @@ jobs:
         uses: Swatinem/rust-cache@v1
 
       - name: Run tests
-        run: cargo test --verbose
\ No newline at end of file
+        run: cargo test --verbose
diff --git a/src/commands/count.rs b/src/commands/count.rs
index 1af2f79..d9f148b 100644
--- a/src/commands/count.rs
+++ b/src/commands/count.rs
@@ -504,7 +504,7 @@ struct CountStats {
     zero_read_guides: u64,
 }
 
-impl<'a> CountResult<'a> {
+impl CountResult<'_> {
     /// Returns the total number of reads that mapped to a guide.
     pub fn mapped_reads(&self) -> u64 {
         self.counts.values().sum()