diff --git a/app/Utils/HtmlEngine.php b/app/Utils/HtmlEngine.php
index abe051a35c59..78e919389119 100644
--- a/app/Utils/HtmlEngine.php
+++ b/app/Utils/HtmlEngine.php
@@ -317,7 +317,7 @@ class HtmlEngine
         $data['_rate2'] = ['value' => '', 'label' => ctrans('texts.tax')];
         $data['_rate3'] = ['value' => '', 'label' => ctrans('texts.tax')];
 
-        $data['$font-size'] = ['value' => $this->settings->font_size . 'px', 'label' => ''];
+        $data['$font_size'] = ['value' => $this->settings->font_size . 'px', 'label' => ''];
 
         $data['$invoiceninja.whitelabel'] = ['value' => asset('images/created-by-invoiceninja-new.png'), 'label' => ''];
 
diff --git a/resources/views/pdf-designs/bold.html b/resources/views/pdf-designs/bold.html
index 8560d000c2a5..fa0b1a4c238d 100644
--- a/resources/views/pdf-designs/bold.html
+++ b/resources/views/pdf-designs/bold.html
@@ -8,7 +8,7 @@
             * {
                 margin: 0;
                 padding: 0;
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             body {
diff --git a/resources/views/pdf-designs/business.html b/resources/views/pdf-designs/business.html
index b75e2d489d46..dce27f8c5ea8 100644
--- a/resources/views/pdf-designs/business.html
+++ b/resources/views/pdf-designs/business.html
@@ -9,7 +9,7 @@
                 -webkit-font-smoothing: antialiased;
                 -moz-osx-font-smoothing: grayscale;
                 font-family: Arial, Helvetica, sans-serif;
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             @page {
diff --git a/resources/views/pdf-designs/clean.html b/resources/views/pdf-designs/clean.html
index 0d84d8e69dc8..c3919f4220f3 100644
--- a/resources/views/pdf-designs/clean.html
+++ b/resources/views/pdf-designs/clean.html
@@ -10,7 +10,7 @@
                 -webkit-font-smoothing: antialiased;
                 -moz-osx-font-smoothing: grayscale;
                 font-family: Arial, Helvetica, sans-serif;
-                font-size: '$font-size';
+                font-size: '$font_size';
                 margin: 1cm;
             }
 
diff --git a/resources/views/pdf-designs/creative.html b/resources/views/pdf-designs/creative.html
index 12afeced77fb..15f2f573dead 100644
--- a/resources/views/pdf-designs/creative.html
+++ b/resources/views/pdf-designs/creative.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             p {
diff --git a/resources/views/pdf-designs/elegant.html b/resources/views/pdf-designs/elegant.html
index 613df3046dac..332ad23d38c6 100644
--- a/resources/views/pdf-designs/elegant.html
+++ b/resources/views/pdf-designs/elegant.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             p {
diff --git a/resources/views/pdf-designs/hipster.html b/resources/views/pdf-designs/hipster.html
index d549f89f9663..5c5d5b49a6ba 100644
--- a/resources/views/pdf-designs/hipster.html
+++ b/resources/views/pdf-designs/hipster.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             p {
diff --git a/resources/views/pdf-designs/modern.html b/resources/views/pdf-designs/modern.html
index c4d06d678fc7..741d3acf4d03 100644
--- a/resources/views/pdf-designs/modern.html
+++ b/resources/views/pdf-designs/modern.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             body {
diff --git a/resources/views/pdf-designs/plain.html b/resources/views/pdf-designs/plain.html
index 485b1225f6f5..be64b713d05b 100644
--- a/resources/views/pdf-designs/plain.html
+++ b/resources/views/pdf-designs/plain.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             p {
diff --git a/resources/views/pdf-designs/playful.html b/resources/views/pdf-designs/playful.html
index 89d602512390..4fce2118288f 100644
--- a/resources/views/pdf-designs/playful.html
+++ b/resources/views/pdf-designs/playful.html
@@ -6,7 +6,7 @@
 
         <style id="style">
             * {
-                font-size: '$font-size';
+                font-size: '$font_size';
             }
 
             p {