diff --git a/data/common.css b/data/common.css
index 596f664d..54b18011 100644
--- a/data/common.css
+++ b/data/common.css
@@ -5,9 +5,10 @@ sq_view {
     font-size: 1.5em;
 }
 
+/* Becomes readable with a special font */
 sq_view.gr_polytonic {
-    font-family: cantarell, sans-serif;
-    font-size: 5em;
+    font-family: GFSDidotClassic, cantarell, sans-serif;
+    font-size: 2em;
 }
 
 sq_button {
diff --git a/debian/control b/debian/control
index 5c40771d..bf059d18 100644
--- a/debian/control
+++ b/debian/control
@@ -37,6 +37,8 @@ Homepage: https://source.puri.sm/Librem5/squeekboard
 Package: squeekboard
 Architecture: linux-any
 Depends:
+# for Greek polytonic readability
+ fonts-gfs-didot-classic,
 # for the Adwaita-dark theme
  gnome-themes-extra-data,
  ${shlibs:Depends},
diff --git a/debian/control-newer b/debian/control-newer
index 177a7a94..c3ed6917 100644
--- a/debian/control-newer
+++ b/debian/control-newer
@@ -37,6 +37,8 @@ Homepage: https://source.puri.sm/Librem5/squeekboard
 Package: squeekboard
 Architecture: linux-any
 Depends:
+# for Greek polytonic readability
+ fonts-gfs-didot-classic,
 # for the Adwaita-dark theme
  gnome-themes-extra-data,
  ${shlibs:Depends},