diff --git a/mailpoet/lib/EmailEditor/Engine/SettingsController.php b/mailpoet/lib/EmailEditor/Engine/SettingsController.php
index 66500bb949..54c0ce4aa7 100644
--- a/mailpoet/lib/EmailEditor/Engine/SettingsController.php
+++ b/mailpoet/lib/EmailEditor/Engine/SettingsController.php
@@ -106,14 +106,16 @@ class SettingsController {
     $coreThemeData = \WP_Theme_JSON_Resolver::get_core_data();
     $coreSettings = $coreThemeData->get_settings();
 
+    // Email Editor Theme
+    $editorTheme = $this->getTheme();
+
     // Enable custom spacing
     $coreSettings['spacing']['units'] = ['px'];
     $coreSettings['spacing']['padding'] = true;
     // Typography
     $coreSettings['typography']['dropCap'] = false; // Showing large initial letter cannot be implemented in emails
     $coreSettings['typography']['fontWeight'] = false; // Font weight will be handled by the font family later
-
-    $theme = $this->getTheme();
+    $coreSettings['typography']['fontFamilies']['default'] = $editorTheme->get_data()['settings']['typography']['fontFamilies'];
 
     // body selector is later transformed to .editor-styles-wrapper
     // setting padding for bottom and top is needed because \WP_Theme_JSON::get_stylesheet() set them only for .wp-site-blocks selector
@@ -130,7 +132,7 @@ class SettingsController {
     $settings['styles'] = [
       $coreDefaultSettings['defaultEditorStyles'][0],
       ['css' => wp_get_global_stylesheet(['base-layout-styles'])],
-      ['css' => $theme->get_stylesheet()],
+      ['css' => $editorTheme->get_stylesheet()],
       ['css' => $contentVariables],
       ['css' => $flexEmailLayoutStyles],
     ];
diff --git a/mailpoet/lib/EmailEditor/Engine/theme.json b/mailpoet/lib/EmailEditor/Engine/theme.json
index f38613980f..2f0e224e17 100644
--- a/mailpoet/lib/EmailEditor/Engine/theme.json
+++ b/mailpoet/lib/EmailEditor/Engine/theme.json
@@ -5,6 +5,20 @@
     "layout": {
       "contentSize": "660px"
     },
+    "typography": {
+      "fontFamilies": [
+        {
+          "fontFamily": "-apple-system, BlinkMacSystemFont, avenir next, avenir, segoe ui, helvetica neue, helvetica, Cantarell, Ubuntu, roboto, noto, arial, sans-serif",
+          "name": "System Sans-serif",
+          "slug": "system-sans-serif"
+        },
+        {
+          "fontFamily": "Iowan Old Style, Apple Garamond, Baskerville, Times New Roman, Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol",
+          "name": "System Serif",
+          "slug": "system-Serif"
+        }
+      ]
+    },
     "useRootPaddingAwareAlignments": true
   },
   "styles": {