diff --git a/app/src/debug/res/font/opensans.xml b/app/src/debug/res/font/opensans.xml
new file mode 100644
index 0000000000..9b59b9e86e
--- /dev/null
+++ b/app/src/debug/res/font/opensans.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<font-family xmlns:app="http://schemas.android.com/apk/res-auto">
+    <font
+        app:font="@font/opensans_regular"
+        app:fontStyle="normal"
+        app:fontWeight="400" />
+    <font
+        app:font="@font/opensans_italic"
+        app:fontStyle="italic"
+        app:fontWeight="400" />
+    <font
+        app:font="@font/opensans_bold"
+        app:fontStyle="normal"
+        app:fontWeight="700" />
+    <font
+        app:font="@font/opensans_bold_italic"
+        app:fontStyle="italic"
+        app:fontWeight="700" />
+</font-family>
\ No newline at end of file
diff --git a/app/src/debug/res/font/opensans_bold.ttf b/app/src/debug/res/font/opensans_bold.ttf
new file mode 100644
index 0000000000..4d8f3e5b90
Binary files /dev/null and b/app/src/debug/res/font/opensans_bold.ttf differ
diff --git a/app/src/debug/res/font/opensans_bold_italic.ttf b/app/src/debug/res/font/opensans_bold_italic.ttf
new file mode 100644
index 0000000000..eba75d7421
Binary files /dev/null and b/app/src/debug/res/font/opensans_bold_italic.ttf differ
diff --git a/app/src/debug/res/font/opensans_italic.ttf b/app/src/debug/res/font/opensans_italic.ttf
new file mode 100644
index 0000000000..b0884744c5
Binary files /dev/null and b/app/src/debug/res/font/opensans_italic.ttf differ
diff --git a/app/src/debug/res/font/opensans_regular.ttf b/app/src/debug/res/font/opensans_regular.ttf
new file mode 100644
index 0000000000..3a29f26497
Binary files /dev/null and b/app/src/debug/res/font/opensans_regular.ttf differ
diff --git a/app/src/main/java/eu/faircode/email/StyleHelper.java b/app/src/main/java/eu/faircode/email/StyleHelper.java
index 511f2f7d69..6b2f6e94f9 100644
--- a/app/src/main/java/eu/faircode/email/StyleHelper.java
+++ b/app/src/main/java/eu/faircode/email/StyleHelper.java
@@ -931,6 +931,8 @@ public class StyleHelper {
         // https://developer.mozilla.org/en-US/docs/Web/CSS/font-family
         // TODO: Microsoft: Georgia (Serif), Tahoma (Sans-serif), Trebuchet MS (Sans-serif)
         String faces = family.toLowerCase(Locale.ROOT);
+        if (faces.contains("open sans"))
+            return "Open Sans, Arial, Verdana, Helvetica, Helvetica Neue, sans-serif";
         if (faces.contains("arimo"))
             return "Arimo, Arial, Verdana, Helvetica, Helvetica Neue, sans-serif";
         if (faces.contains("tinos"))
@@ -970,6 +972,9 @@ public class StyleHelper {
             return ResourcesCompat.getFont(context, R.font.fantasy);
 
         if (bundled_fonts) {
+            if (faces.contains("open sans"))
+                return ResourcesCompat.getFont(context, R.font.opensans);
+
             if (faces.contains("arimo") ||
                     faces.contains("arial") ||
                     faces.contains("verdana") ||
@@ -1033,6 +1038,8 @@ public class StyleHelper {
             result.add(new FontDescriptor("cousine", "Cousine (Courier New)", true));
             result.add(new FontDescriptor("lato", "Lato (Calibri)", true));
             result.add(new FontDescriptor("caladea", "Caladea (Cambria)", true));
+            if (BuildConfig.DEBUG)
+                result.add(new FontDescriptor("open sans", "Open Sans", true));
 
             result.add(new FontDescriptor("comic sans", "OpenDyslexic", true));
         }
diff --git a/app/src/main/res/font/opensans.xml b/app/src/main/res/font/opensans.xml
new file mode 100644
index 0000000000..cf0d10f056
--- /dev/null
+++ b/app/src/main/res/font/opensans.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<font-family xmlns:app="http://schemas.android.com/apk/res-auto">
+    <font
+        app:font="@font/arimo_regular"
+        app:fontStyle="normal"
+        app:fontWeight="400" />
+    <font
+        app:font="@font/arimo_italic"
+        app:fontStyle="italic"
+        app:fontWeight="400" />
+    <font
+        app:font="@font/arimo_bold"
+        app:fontStyle="normal"
+        app:fontWeight="700" />
+    <font
+        app:font="@font/arimo_bolditalic"
+        app:fontStyle="italic"
+        app:fontWeight="700" />
+</font-family>
\ No newline at end of file