diff --git a/packages/core/admin/admin/src/content-manager/components/Wysiwyg/EditorStylesContainer.js b/packages/core/admin/admin/src/content-manager/components/Wysiwyg/EditorStylesContainer.js
index 36d556b612..e7a627c8a2 100644
--- a/packages/core/admin/admin/src/content-manager/components/Wysiwyg/EditorStylesContainer.js
+++ b/packages/core/admin/admin/src/content-manager/components/Wysiwyg/EditorStylesContainer.js
@@ -16,7 +16,7 @@ export const EditorStylesContainer = styled.div`
     height: ${({ isExpandMode }) => (isExpandMode ? '100%' : '290px')};
     color: ${({ theme }) => theme.colors.neutral800};
     direction: ltr;
-    font-family: --apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell,
+    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell,
       'Open Sans', 'Helvetica Neue', sans-serif;
   }
 
diff --git a/packages/core/admin/admin/src/content-manager/components/Wysiwyg/tests/index.test.js b/packages/core/admin/admin/src/content-manager/components/Wysiwyg/tests/index.test.js
index e674d2e12f..1b30d01df4 100644
--- a/packages/core/admin/admin/src/content-manager/components/Wysiwyg/tests/index.test.js
+++ b/packages/core/admin/admin/src/content-manager/components/Wysiwyg/tests/index.test.js
@@ -626,7 +626,7 @@ describe('Wysiwyg render and actions buttons', () => {
         height: 290px;
         color: #32324d;
         direction: ltr;
-        font-family: --apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell, 'Open Sans','Helvetica Neue',sans-serif;
+        font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell, 'Open Sans','Helvetica Neue',sans-serif;
       }
 
       .c34 .CodeMirror-lines {