diff --git a/documentation/UserManual/ReactPhysics3D-UserManual.tex b/documentation/UserManual/ReactPhysics3D-UserManual.tex
index 6cf679e8..3652c7c1 100644
--- a/documentation/UserManual/ReactPhysics3D-UserManual.tex
+++ b/documentation/UserManual/ReactPhysics3D-UserManual.tex
@@ -2,7 +2,7 @@
 
 % packages
 \usepackage[T1]{fontenc}
-\usepackage[latin1]{inputenc}
+\usepackage[utf8]{inputenc}
 \usepackage{amsmath}
 \usepackage{amsfonts}
 \usepackage{amssymb}