diff --git a/armadillo-9.880.1.tar.xz b/armadillo-9.880.1.tar.xz
deleted file mode 100644
index d9ad551..0000000
--- a/armadillo-9.880.1.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:900f3e8d35d8b722217bed979fa618faf6f3e4f56964c887a1fce44c3d4c4b9f
-size 4721356
diff --git a/armadillo-9.900.1.tar.xz b/armadillo-9.900.1.tar.xz
new file mode 100644
index 0000000..78adeb2
--- /dev/null
+++ b/armadillo-9.900.1.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:53d7ad6124d06fdede8d839c091c649c794dae204666f1be0d30d7931737d635
+size 4724420
diff --git a/armadillo.changes b/armadillo.changes
index bfe7554..e3dde5a 100644
--- a/armadillo.changes
+++ b/armadillo.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Tue Jun  9 22:00:18 UTC 2020 - Atri Bhattacharya <badshah400@gmail.com>
+
+- Update to version 9.900.1:
+  * Faster solve() for under/over-determined systems.
+  * Faster eig_gen() and eig_pair() for large matrices.
+  * Expanded eig_gen() and eig_pair() to optionally provide left
+    and right eigenvectors.
+- Use cmake macros for configuring, building, and installing.
+- Run spec-cleaner for minor cleanups.
+
 -------------------------------------------------------------------
 Sun May 17 18:10:12 UTC 2020 - Atri Bhattacharya <badshah400@gmail.com>
 
diff --git a/armadillo.spec b/armadillo.spec
index ab1bb0f..ffd3e64 100644
--- a/armadillo.spec
+++ b/armadillo.spec
@@ -18,7 +18,7 @@
 
 %define soname libarmadillo9
 Name:           armadillo
-Version:        9.880.1
+Version:        9.900.1
 Release:        0
 Summary:        C++ matrix library with interfaces to LAPACK and ATLAS
 License:        Apache-2.0
@@ -33,7 +33,6 @@ BuildRequires:  gcc-c++
 BuildRequires:  lapack-devel
 BuildRequires:  pkgconfig
 BuildRequires:  superlu-devel >= 5.2
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
 Armadillo is a C++ linear algebra library (matrix maths).
@@ -100,24 +99,20 @@ sed -i 's/\r$//' NOTICE.txt
 for i in `ls examples/*.cpp`; do sed -i 's/\r$//' $i; done
 
 %build
-cmake . \
-        -DCMAKE_INSTALL_PREFIX:PATH=%{_prefix}\
-        -DCMAKE_INSTALL_LIBDIR:PATH=%{_libdir}
-make %{?_smp_mflags}
+%cmake
+%cmake_build
 
 %install
-make DESTDIR=%{buildroot} install
+%cmake_install
 rm -f examples/Makefile.cmake
 rm -rf examples/example1_win64.*
 rm -rf examples/example2_win64.*
 rm -rf examples/lib_win64
 
 %post -n %{soname} -p /sbin/ldconfig
-
 %postun -n %{soname} -p /sbin/ldconfig
 
 %files -n %{soname}
-%defattr(-,root,root)
 %{_libdir}/*.so.*
 
 %files doc