diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 6bf988e..16f84c2 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -121,7 +121,7 @@ jobs:
         if: ${{ matrix.label == 'full' }}
 
       - name: Codecov submission of fast test results
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           verbose: true
           fail_ci_if_error: true
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..e1dbc71
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,27 @@
+# For more configuration details:
+# https://docs.codecov.io/docs/codecov-yaml
+
+# Check if this file is valid by running in bash:
+# curl -X POST --data-binary @.codecov.yml https://codecov.io/validate
+
+# Coverage configuration
+# ----------------------
+coverage:
+  status:
+    patch: false
+
+  range: 70..90     # First number represents red, and second represents green
+                    # (default is 70..100)
+  round: down       # up, down, or nearest
+  precision: 2      # Number of decimal places, between 0 and 5
+
+# Ignoring Paths
+# --------------
+# which folders/files to ignore
+
+# Pull request comments:
+# ----------------------
+# Diff is the Coverage Diff of the pull request.
+# Files are the files impacted by the pull request
+comment:
+  layout: diff, files  # accepted in any order: reach, diff, flags, and/or files