diff --git a/CHANGES.txt b/CHANGES.txt
index 6170d97..776cd55 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -29,6 +29,8 @@ Changes
 - Drop old single-argument signature format for ``AXES_USERNAME_CALLABLE``.
   [aleksihakli]
 
+- Improve tests and raise Codecov monitoring threshold to 90%.
+  [aleksihakli]
 
 4.5.4 (2019-01-15)
 ------------------
diff --git a/codecov.yml b/codecov.yml
index acf7e14..2d3df9b 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -4,6 +4,6 @@ coverage:
     project:
       default:
         # Minimum test coverage required for pass
-        target: 80%
+        target: 90%
         # Maximum test coverage change allowed for pass
         threshold: 20%