diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6956902..aa68a0a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -28,4 +28,4 @@ jobs:
 
       - name: Run tests with coverage
         run: |
-          pytest --cov=app --cov-report=term-missing --cov-fail-under=85
+          pytest --cov=app --cov-report=term-missing --cov-fail-under=80
diff --git a/README.md b/README.md
index d97d491..8e4fec1 100644
--- a/README.md
+++ b/README.md
@@ -120,7 +120,7 @@ pytest --cov=app --cov-report=term-missing
 
 2) Coverage gate in CI
 - GitHub Actions workflow runs on pushes and PRs, testing Python 3.10–3.12.
-- The job fails if line coverage for `app` drops below 85%.
+- The job fails if line coverage for `app` drops below 80%.
 
 3) What is covered
 - Core function `get_metrics` and the `/metrics` Flask endpoint are tested with `psutil` mocked.