diff --git a/libksysguard-5.20.5.tar.xz b/libksysguard-5.20.5.tar.xz
deleted file mode 100644
index 3bbfd76..0000000
--- a/libksysguard-5.20.5.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:a8a5635c88559567342eba77c707269ab23bc0ce1775ce424c0abd57a83e5d6c
-size 699156
diff --git a/libksysguard-5.20.5.tar.xz.sig b/libksysguard-5.20.5.tar.xz.sig
deleted file mode 100644
index adcd4fe..0000000
--- a/libksysguard-5.20.5.tar.xz.sig
+++ /dev/null
@@ -1,11 +0,0 @@
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diff --git a/libksysguard-5.21.0.tar.xz b/libksysguard-5.21.0.tar.xz
new file mode 100644
index 0000000..17c99ec
--- /dev/null
+++ b/libksysguard-5.21.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:0e6fe8c431dd62833e300ad06682fe90311472bd966617291dee22dd37296e86
+size 705860
diff --git a/libksysguard-5.21.0.tar.xz.sig b/libksysguard-5.21.0.tar.xz.sig
new file mode 100644
index 0000000..d85e65d
--- /dev/null
+++ b/libksysguard-5.21.0.tar.xz.sig
@@ -0,0 +1,11 @@
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diff --git a/libksysguard5.changes b/libksysguard5.changes
index 3616be4..acbbb5d 100644
--- a/libksysguard5.changes
+++ b/libksysguard5.changes
@@ -1,3 +1,34 @@
+-------------------------------------------------------------------
+Thu Feb 11 18:23:13 UTC 2021 - Fabian Vogt <fabian@ritter-vogt.de>
+
+- Update to 5.21.0
+  * New bugfix release
+  * For more details please see:
+  * https://kde.org/announcements/plasma/5/5.21.0
+- Changes since 5.20.90:
+  * Ensure text doesn't flow outside the Pie Chart face (kde#431995)
+  * Respect "show title" flag for Faces' CompactRepresentation
+  * Reduce default history amount for line charts to 60 seconds
+  * Do the sensor setters in two stages (kde#432254)
+  * Always reset minimum and maximum, not only when inserting
+  * Use faster file system searcing for iterating process groups
+  * Also require C++ 17 on stable
+  * SensorDataModel: Cache minimum and maximum values
+  * Fix dataChanged emitted when PIDs are loaded
+  * Avoid formatting NaN values
+  * Don't call update inside the application constructor
+  * Filter our services in the application slice which don't match the app string specifier
+  * Prevent inadvertently writing config when destroying SensorFaceController (kde#428970)
+
+-------------------------------------------------------------------
+Thu Jan 21 21:31:41 UTC 2021 - Fabian Vogt <fabian@ritter-vogt.de>
+
+- Update to 5.20.90
+  * New feature release
+  * For more details please see:
+  * https://kde.org/announcements/plasma/5/20.90/
+- Too many changes to list here
+
 -------------------------------------------------------------------
 Fri Jan  8 16:04:08 UTC 2021 - Fabian Vogt <fabian@ritter-vogt.de>
 
diff --git a/libksysguard5.spec b/libksysguard5.spec
index 23ab398..9977a7c 100644
--- a/libksysguard5.spec
+++ b/libksysguard5.spec
@@ -18,20 +18,24 @@
 
 %bcond_without lang
 Name:           libksysguard5
-Version:        5.20.5
+Version:        5.21.0
 Release:        0
 Summary:        Task management and system monitoring library
 License:        GPL-2.0-or-later
 Group:          Development/Libraries/C and C++
 URL:            http://www.kde.org
-Source:         https://download.kde.org/stable/plasma/%{version}/libksysguard-%{version}.tar.xz
+Source:         libksysguard-%{version}.tar.xz
 %if %{with lang}
-Source1:        https://download.kde.org/stable/plasma/%{version}/libksysguard-%{version}.tar.xz.sig
+Source1:        libksysguard-%{version}.tar.xz.sig
 Source2:        plasma.keyring
 %endif
 BuildRequires:  extra-cmake-modules >= 1.2.0
 BuildRequires:  kf5-filesystem
 BuildRequires:  xz
+%if 0%{?suse_version} <= 1500
+# It does not build with the default compiler (GCC 7) on Leap 15.x
+BuildRequires:  gcc10-c++
+%endif
 BuildRequires:  cmake(KF5Auth)
 BuildRequires:  cmake(KF5Completion)
 BuildRequires:  cmake(KF5Config)
@@ -105,6 +109,9 @@ QML applications.
 %autosetup -p1 -n libksysguard-%{version}
 
 %build
+  %if 0%{?suse_version} <= 1500
+    export CC=gcc-10 CXX=g++-10
+  %endif
   %cmake_kf5 -d build -- -DCMAKE_INSTALL_LOCALEDIR=%{_kf5_localedir}
   %cmake_build