diff --git a/.gitignore b/.gitignore
index d503e30..12cdb6d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ libebml-1.0.0.tar.bz2
 /libebml-1.3.4.tar.bz2
 /libebml-1.3.5.tar.xz
 /libebml-1.3.6.tar.xz
+/libebml-1.3.7.tar.xz
diff --git a/libebml-use-system-utf8cpp.patch b/libebml-use-system-utf8cpp.patch
new file mode 100644
index 0000000..3003e1a
--- /dev/null
+++ b/libebml-use-system-utf8cpp.patch
@@ -0,0 +1,12 @@
+diff -up libebml-1.3.7/src/EbmlUnicodeString.cpp.utf8cpp libebml-1.3.7/src/EbmlUnicodeString.cpp
+--- libebml-1.3.7/src/EbmlUnicodeString.cpp.utf8cpp	2019-03-12 20:27:42.000000000 +0100
++++ libebml-1.3.7/src/EbmlUnicodeString.cpp	2019-06-07 22:54:39.002363241 +0200
+@@ -39,7 +39,7 @@
+ 
+ #include "ebml/EbmlUnicodeString.h"
+ 
+-#include "lib/utf8-cpp/source/utf8/checked.h"
++#include <utf8/checked.h>
+ 
+ START_LIBEBML_NAMESPACE
+ 
diff --git a/libebml.spec b/libebml.spec
index 33bc592..43ea347 100644
--- a/libebml.spec
+++ b/libebml.spec
@@ -1,13 +1,15 @@
 Summary:    Extensible Binary Meta Language library
 Name:       libebml
-Version:    1.3.6
+Version:    1.3.7
 Release:    1%{?dist}
 License:    LGPLv2+
 Group:      System Environment/Libraries
 URL:        https://www.matroska.org/
 Source:     https://dl.matroska.org/downloads/%{name}/%{name}-%{version}.tar.xz
+Patch0:     %{name}-use-system-utf8cpp.patch
 BuildRequires: cmake
 BuildRequires: gcc-c++
+BuildRequires: utf8cpp-devel
 
 %description
 Extensible Binary Meta Language access library A library for reading
@@ -33,6 +35,8 @@ will use the Extensible Binary Meta Language library.
 
 %prep
 %setup -q
+%patch0 -p1 -b .utf8cpp
+rm -r src/lib/utf8-cpp
 
 
 %build
@@ -63,6 +67,10 @@ make %{?_smp_mflags}
 
 
 %changelog
+* Fri Jun 07 2019 Dominik Mierzejewski <rpm@greysector.net> - 1.3.7-1
+- update to 1.3.7
+- unbundle utf8cpp
+
 * Mon Jul 23 2018 Dominik Mierzejewski <rpm@greysector.net> - 1.3.6-1
 - update to 1.3.6 (#1570224)
 - add BR: gcc for https://fedoraproject.org/wiki/Changes/Remove_GCC_from_BuildRoot
diff --git a/sources b/sources
index a9eb27c..405aaa0 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libebml-1.3.6.tar.xz) = 6a31a56dcde39642848f25353a462f4621d6cfd3bc9ef62add1b00d098c6a80b3c2b50ecf4d6dd50650c609eb39a6150c6d1b69ea3a77a3928bd3300af7dd91f
+SHA512 (libebml-1.3.7.tar.xz) = ad574a73a1d2c5fbd4581991ff790ef22cfcaf5645295b06dce36235b43d552bbec3b400d3c80550c8020ed3720226fad05348c6034c444da1106439c7fd9fc1