diff --git a/fonts/cormorant-garamond/font.json b/fonts/cormorant-garamond/font.json
index 1cbb98a5..c542a4cb 100644
--- a/fonts/cormorant-garamond/font.json
+++ b/fonts/cormorant-garamond/font.json
@@ -4,7 +4,7 @@
   "version": "16",
   "key": "cormorant-garamond",
   "name": "Cormorant Garamond",
-  "family": "'Cormorant Garamond'",
+  "family": "Cormorant Garamond",
   "alt": "Garamond",
   "type": "serif",
   "styles": ["normal", "italic"],
diff --git a/fonts/crimson-text/font.json b/fonts/crimson-text/font.json
index b2a09526..37f1cd8d 100644
--- a/fonts/crimson-text/font.json
+++ b/fonts/crimson-text/font.json
@@ -4,7 +4,7 @@
   "version": "19",
   "key": "crimson-text",
   "name": "Crimson Text",
-  "family": "'Crimson Text'",
+  "family": "Crimson Text",
   "type": "serif",
   "styles": ["normal", "italic"],
   "weights": [400, 600, 700],
diff --git a/fonts/helvetica-neue/font.json b/fonts/helvetica-neue/font.json
index 594c0f8c..393069d0 100644
--- a/fonts/helvetica-neue/font.json
+++ b/fonts/helvetica-neue/font.json
@@ -4,7 +4,7 @@
   "version": "",
   "key": "helvetica-neue",
   "name": "Helvetica Neue",
-  "family": "'Helvetica Neue'",
+  "family": "Helvetica Neue",
   "alt": "Helvetica, Arial",
   "type": "sans-serif",
   "styles": ["normal", "italic"],
diff --git a/fonts/open-sans/font.json b/fonts/open-sans/font.json
index b728b155..a2b176c4 100644
--- a/fonts/open-sans/font.json
+++ b/fonts/open-sans/font.json
@@ -4,7 +4,7 @@
   "version": "40",
   "key": "open-sans",
   "name": "Open Sans",
-  "family": "'Open Sans'",
+  "family": "Open Sans",
   "type": "sans-serif",
   "styles": ["normal", "italic"],
   "weights": [300, 325, 400, 500, 600, 700],
diff --git a/fonts/roboto-mono/font.json b/fonts/roboto-mono/font.json
index df7f97e3..dc619dc7 100644
--- a/fonts/roboto-mono/font.json
+++ b/fonts/roboto-mono/font.json
@@ -4,7 +4,7 @@
   "version": "23",
   "key": "roboto-mono",
   "name": "Roboto Mono",
-  "family": "'Roboto Mono'",
+  "family": "Roboto Mono",
   "type": "monospace",
   "styles": ["normal", "italic"],
   "weights": [300, 400, 500, 600, 700],
diff --git a/fonts/roboto-serif/font.json b/fonts/roboto-serif/font.json
index 74332082..160df336 100644
--- a/fonts/roboto-serif/font.json
+++ b/fonts/roboto-serif/font.json
@@ -4,7 +4,7 @@
   "version": "13",
   "key": "roboto-serif",
   "name": "Roboto Serif",
-  "family": "'Roboto Serif'",
+  "family": "Roboto Serif",
   "type": "serif",
   "styles": ["normal", "italic"],
   "weights": [300, 400, 500, 600, 700],
diff --git a/includes/functions/_utility.php b/includes/functions/_utility.php
index 019efdb9..c2f7ef23 100644
--- a/includes/functions/_utility.php
+++ b/includes/functions/_utility.php
@@ -1977,7 +1977,7 @@ if ( ! function_exists( 'fictioneer_get_fonts' ) ) {
     // Setup
     $custom_fonts = get_option( 'fictioneer_chapter_fonts' );
     $fonts = array(
-      array( 'css' => "'" . FICTIONEER_PRIMARY_FONT_CSS . "'", 'name' => FICTIONEER_PRIMARY_FONT_NAME ),
+      array( 'css' => fictioneer_font_family_value( FICTIONEER_PRIMARY_FONT_CSS ), 'name' => FICTIONEER_PRIMARY_FONT_NAME ),
       array( 'css' => '', 'name' => _x( 'System Font', 'Font name.', 'fictioneer' ) )
     );
 
@@ -1997,6 +1997,29 @@ if ( ! function_exists( 'fictioneer_get_fonts' ) ) {
   }
 }
 
+// =============================================================================
+// WRAP MULTI-WORD FONTS INTO QUOTES
+// =============================================================================
+
+/**
+ * Returns font family value with quotes if required
+ *
+ * @since 5.10.0
+ *
+ * @param string $font_value  The font family value.
+ * @param string $quote       Optional. The wrapping character. Default '"'.
+ *
+ * @return string Ready to use font family value.
+ */
+
+function fictioneer_font_family_value( $font_value, $quote = '"' ) {
+  if ( preg_match( '/\s/', $font_value ) ) {
+    return $quote . $font_value . $quote;
+  } else {
+    return $font_value;
+  }
+}
+
 // =============================================================================
 // GET FONT COLORS
 // =============================================================================
@@ -2792,7 +2815,7 @@ function fictioneer_build_bundled_fonts() {
   foreach ( $fonts as $font ) {
     if ( $font['chapter'] ?? 0 ) {
       $font_stack[ $font['key'] ] = array(
-        'css' => $font['family'] ?? '',
+        'css' => fictioneer_font_family_value( $font['family'] ?? '' ),
         'name' => $font['name'] ?? '',
         'alt' => $font['alt'] ?? ''
       );