diff --git a/dejavu-fonts-urn-dtd.patch b/dejavu-fonts-urn-dtd.patch
new file mode 100644
index 0000000..7d06cc8
--- /dev/null
+++ b/dejavu-fonts-urn-dtd.patch
@@ -0,0 +1,120 @@
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-sans.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-sans.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-sans.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-sans.conf	2020-04-02 20:56:06.341929827 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-lgc-sans.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-sans-mono.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-sans-mono.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-sans-mono.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-sans-mono.conf	2020-04-02 20:56:06.353930041 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-lgc-sans-mono.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-serif.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-serif.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-lgc-serif.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-lgc-serif.conf	2020-04-02 20:56:06.359930147 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-lgc-serif.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-sans.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-sans.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-sans.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-sans.conf	2020-04-02 20:56:06.367930290 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-sans.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-sans-mono.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-sans-mono.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-sans-mono.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-sans-mono.conf	2020-04-02 20:56:06.372930379 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-sans-mono.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-serif.conf dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-serif.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/20-unhint-small-dejavu-serif.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/20-unhint-small-dejavu-serif.conf	2020-04-02 20:56:06.378930486 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <fontconfig>
+   <!--  /etc/fonts/conf.d/20-unhint-small-dejavu-serif.conf
+ 
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-sans.conf dejavu-fonts-version_2_37/fontconfig/57-dejavu-sans.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-sans.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/57-dejavu-sans.conf	2020-04-02 20:56:06.384930592 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/57-dejavu-sans.conf
+ 
+      Define aliasing and other fontconfig settings for
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-sans-mono.conf dejavu-fonts-version_2_37/fontconfig/57-dejavu-sans-mono.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-sans-mono.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/57-dejavu-sans-mono.conf	2020-04-02 20:56:06.390930699 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/57-dejavu-sans-mono.conf
+ 
+      Define aliasing and other fontconfig settings for
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-serif.conf dejavu-fonts-version_2_37/fontconfig/57-dejavu-serif.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/57-dejavu-serif.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/57-dejavu-serif.conf	2020-04-02 20:56:06.396930806 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/57-dejavu-serif.conf
+ 
+      Define aliasing and other fontconfig settings for
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-sans.conf dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-sans.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-sans.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-sans.conf	2020-04-02 20:56:06.401930895 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/58-dejavu-lgc-sans.conf
+ 
+      Define aliasing and other fontconfig settings for
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-sans-mono.conf dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-sans-mono.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-sans-mono.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-sans-mono.conf	2020-04-02 20:56:06.407931001 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/58-dejavu-lgc-sans-mono.conf
+ 
+      Define aliasing and other fontconfig settings for
+diff -uNr dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-serif.conf dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-serif.conf
+--- dejavu-fonts-version_2_37.orig/fontconfig/58-dejavu-lgc-serif.conf	2016-07-30 11:52:54.000000000 +0200
++++ dejavu-fonts-version_2_37/fontconfig/58-dejavu-lgc-serif.conf	2020-04-02 20:56:06.412931090 +0200
+@@ -1,5 +1,5 @@
+ <?xml version="1.0" encoding="UTF-8"?>
+-<!DOCTYPE fontconfig SYSTEM "../fonts.dtd">
++<!DOCTYPE fontconfig SYSTEM "urn:fontconfig:fonts.dtd">
+ <!-- /etc/fonts/conf.d/58-dejavu-lgc-serif.conf
+ 
+      Define aliasing and other fontconfig settings for
diff --git a/dejavu-fonts.spec b/dejavu-fonts.spec
index d51dae9..a7c97a5 100644
--- a/dejavu-fonts.spec
+++ b/dejavu-fonts.spec
@@ -126,12 +126,15 @@ Source14: 58-%{fontpkgname4}.xml
 Source15: 58-%{fontpkgname5}.xml
 Source16: 58-%{fontpkgname6}.xml
 
+Patch0:   %{name}-urn-dtd.patch
+
 Name:     dejavu-fonts
 Summary:  The DejaVu font families
 %description
 %wordwrap -v common_description
 
 %fontpkg -a
+%patch0 -p1
 
 %fontmetapkg -z 1,2,3