diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Ceiling.php b/src/PhpSpreadsheet/Calculation/MathTrig/Ceiling.php
index bb6248ba..73f54a52 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Ceiling.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Ceiling.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 
 class Ceiling
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Combinations.php b/src/PhpSpreadsheet/Calculation/MathTrig/Combinations.php
index 2a0cbdfd..97508bb1 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Combinations.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Combinations.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 
 class Combinations
 {
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Floor.php b/src/PhpSpreadsheet/Calculation/MathTrig/Floor.php
index 4b84c24a..04e12205 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Floor.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Floor.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 
 class Floor
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Logarithms.php b/src/PhpSpreadsheet/Calculation/MathTrig/Logarithms.php
index 169a74b0..d6878d88 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Logarithms.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Logarithms.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 
 class Logarithms
 {
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/MatrixFunctions.php b/src/PhpSpreadsheet/Calculation/MathTrig/MatrixFunctions.php
index 290700c6..1e3224ea 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/MatrixFunctions.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/MatrixFunctions.php
@@ -2,10 +2,10 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
 use Matrix\Builder;
 use Matrix\Exception as MatrixException;
 use Matrix\Matrix;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 use PhpOffice\PhpSpreadsheet\Calculation\Functions;
 
 class MatrixFunctions
diff --git a/src/PhpSpreadsheet/Calculation/MathTrig/Random.php b/src/PhpSpreadsheet/Calculation/MathTrig/Random.php
index 0c7acf91..963a789a 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig/Random.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig/Random.php
@@ -2,7 +2,7 @@
 
 namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
 
-use Exception;
+use PhpOffice\PhpSpreadsheet\Calculation\Exception;
 
 class Random
 {