diff --git a/Math/Solver/Root/Bisection.php b/Math/Solver/Root/Bisection.php
index 3b29b0a45..48a16a7fc 100644
--- a/Math/Solver/Root/Bisection.php
+++ b/Math/Solver/Root/Bisection.php
@@ -30,7 +30,7 @@ final class Bisection
      * @var float
      * @since 1.0.0
      */
-    public const EPSILON = 1e-6;
+    public const EPSILON = 4.88e-04;
 
     /**
      * Constructor.
diff --git a/Math/Solver/Root/Illinois.php b/Math/Solver/Root/Illinois.php
index 9f5ca9be9..d4b9bf71e 100644
--- a/Math/Solver/Root/Illinois.php
+++ b/Math/Solver/Root/Illinois.php
@@ -30,7 +30,7 @@ final class Illinois
      * @var float
      * @since 1.0.0
      */
-    public const EPSILON = 1e-6;
+    public const EPSILON = 4.88e-04;
 
     /**
      * Constructor.
diff --git a/Math/Solver/Root/RegulaFalsi.php b/Math/Solver/Root/RegulaFalsi.php
index bd9a794a9..a004a7ec1 100644
--- a/Math/Solver/Root/RegulaFalsi.php
+++ b/Math/Solver/Root/RegulaFalsi.php
@@ -30,7 +30,7 @@ final class RegulaFalsi
      * @var float
      * @since 1.0.0
      */
-    public const EPSILON = 1e-6;
+    public const EPSILON = 4.88e-04;
 
     /**
      * Constructor.