diff --git a/Web-documentation/css/fonts.css b/Web-documentation/css/fonts.css
index bf03f4b..826fbfe 100644
--- a/Web-documentation/css/fonts.css
+++ b/Web-documentation/css/fonts.css
@@ -1,19 +1,19 @@
 @font-face {
     font-family: Roboto;
     font-weight: 400;
-    src: url(../fonts/Roboto-Regular.otf);
+    src: url(../fonts/Roboto-Regular.ttf);
 }
 
 @font-face {
     font-family: Roboto;
     font-weight: 500;
-    src: url(../fonts/Roboto-Medium.otf);
+    src: url(../fonts/Roboto-Medium.ttf);
 }
 
 @font-face {
     font-family: Roboto;
     font-weight: 600;
-    src: url(../fonts/Roboto-Semibold.otf);
+    src: url(../fonts/Roboto-Semibold.ttf);
 }