diff --git a/grpc.changes b/grpc.changes
index 1f43faf..e3b9635 100644
--- a/grpc.changes
+++ b/grpc.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Jun  5 18:52:46 UTC 2019 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to new upstream release 1.21.3
+  * Add SPIFFE security stack to gRPC.
+  * Re-enable ALPN check in gRPC C core SSL stack.
+
 -------------------------------------------------------------------
 Fri Apr 12 18:26:00 CEST 2019 - sbrabec@suse.com
 
diff --git a/grpc.spec b/grpc.spec
index 8e63bca..3e73496 100644
--- a/grpc.spec
+++ b/grpc.spec
@@ -20,9 +20,9 @@
 %define src_install_dir /usr/src/%{name}
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           grpc
-Version:        1.19.1
+Version:        1.21.3
 Release:        0
-%define rver	1.19.1
+%define rver	1.21.3
 Summary:        HTTP/2-based Remote Procedure Call implementation
 License:        Apache-2.0
 Group:          Development/Tools/Building
@@ -37,7 +37,7 @@ BuildRequires:  pkg-config
 BuildRequires:  python-rpm-macros
 BuildRequires:  pkgconfig(libcares)
 BuildRequires:  pkgconfig(openssl) >= 1.0.1
-BuildRequires:  pkgconfig(protobuf) > 3.5.0
+BuildRequires:  pkgconfig(protobuf) >= 3.8.0
 BuildRequires:  pkgconfig(zlib)
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
diff --git a/v1.19.1.tar.gz b/v1.19.1.tar.gz
deleted file mode 100644
index f9f1b1f..0000000
--- a/v1.19.1.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:f869c648090e8bddaa1260a271b1089caccbe735bf47ac9cd7d44d35a02fb129
-size 14794085
diff --git a/v1.21.3.tar.gz b/v1.21.3.tar.gz
new file mode 100644
index 0000000..6c9a8e4
--- /dev/null
+++ b/v1.21.3.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:50747c8939c535b1059f19534de263eb9b7570b5347390fb24b0bbce8763e9a4
+size 15043356