diff --git a/rspamd.changes b/rspamd.changes
index f0674ec..c1b1590 100644
--- a/rspamd.changes
+++ b/rspamd.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Sep 17 20:30:05 UTC 2021 - Marcus Rueckert <mrueckert@suse.de>
+
+- use system libfmt and libzstd instead of building the intree copy 
+
 -------------------------------------------------------------------
 Thu Aug 19 23:06:34 UTC 2021 - Michael Ströder <michael@stroeder.com>
 
diff --git a/rspamd.spec b/rspamd.spec
index 3fdb036..8e35891 100644
--- a/rspamd.spec
+++ b/rspamd.spec
@@ -99,6 +99,7 @@ BuildRequires:  pcre-devel
 BuildRequires:  pcre2-devel
 %endif
 BuildRequires:  pkgconfig
+BuildRequires:  pkgconfig(fmt)
 BuildRequires:  pkgconfig(glib-2.0) >= 2.28
 %if %{with ext_hiredis}
 BuildRequires:  pkgconfig(hiredis)
@@ -115,6 +116,7 @@ BuildRequires:  pkgconfig(sqlite3)
 BuildRequires:  pkgconfig(systemd)
 %{?systemd_ordering}
 %endif
+BuildRequires:  pkgconfig(libzstd)
 
 %if 0%{?suse_version} < 1500
 Requires:       lua51-LPeg
@@ -227,6 +229,8 @@ export CXX="g++-%{?force_gcc_version}"
   %if %{with jemalloc}
   -DENABLE_JEMALLOC=ON                      \
   %endif
+  -DSYSTEM_FMT=ON                           \
+  -DSYSTEM_ZSTD=ON                          \
   -DDEBIAN_BUILD=1                          \
   -DRSPAMD_GROUP=%{rspamd_group}            \
   -DRSPAMD_USER=%{rspamd_user}