diff --git a/src/main/resources/css/dark_theme.css b/src/main/resources/css/dark_theme.css
index 32bddbbf1..86467bb1a 100644
--- a/src/main/resources/css/dark_theme.css
+++ b/src/main/resources/css/dark_theme.css
@@ -5,15 +5,15 @@
  ******************************************************************************/
 
 @font-face {
-	src: url('opensans-regular.ttf');
+	src: url('opensans_regular.ttf');
 }
 
 @font-face {
-	src: url('opensans-semibold.ttf');
+	src: url('opensans_semibold.ttf');
 }
 
 @font-face {
-	src: url('opensans-bold.ttf');
+	src: url('opensans_bold.ttf');
 }
 
 /*******************************************************************************
diff --git a/src/main/resources/css/light_theme.css b/src/main/resources/css/light_theme.css
index a6cd67af9..ddc872eb2 100644
--- a/src/main/resources/css/light_theme.css
+++ b/src/main/resources/css/light_theme.css
@@ -5,15 +5,15 @@
  ******************************************************************************/
 
 @font-face {
-	src: url('opensans-regular.ttf');
+	src: url('opensans_regular.ttf');
 }
 
 @font-face {
-	src: url('opensans-semibold.ttf');
+	src: url('opensans_semibold.ttf');
 }
 
 @font-face {
-	src: url('opensans-bold.ttf');
+	src: url('opensans_bold.ttf');
 }
 
 /*******************************************************************************
diff --git a/src/main/resources/css/opensans-bold.ttf b/src/main/resources/css/opensans_bold.ttf
similarity index 100%
rename from src/main/resources/css/opensans-bold.ttf
rename to src/main/resources/css/opensans_bold.ttf
diff --git a/src/main/resources/css/opensans-regular.ttf b/src/main/resources/css/opensans_regular.ttf
similarity index 100%
rename from src/main/resources/css/opensans-regular.ttf
rename to src/main/resources/css/opensans_regular.ttf
diff --git a/src/main/resources/css/opensans-semibold.ttf b/src/main/resources/css/opensans_semibold.ttf
similarity index 100%
rename from src/main/resources/css/opensans-semibold.ttf
rename to src/main/resources/css/opensans_semibold.ttf
diff --git a/src/main/resources/css/quicksand-bold.ttf b/src/main/resources/css/quicksand_bold.ttf
similarity index 100%
rename from src/main/resources/css/quicksand-bold.ttf
rename to src/main/resources/css/quicksand_bold.ttf