diff --git a/armadillo.spec b/armadillo.spec
index 4894ab6..face70b 100644
--- a/armadillo.spec
+++ b/armadillo.spec
@@ -45,8 +45,9 @@ than another language like Matlab or Octave.
 Summary:        Development headers and documentation for the Armadillo C++ library
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       libstdc++-devel
-Requires:       arpack-devel
-Requires:       hdf5-devel
+# Commented out until these are available in EPEL9.
+#Requires:       arpack-devel
+#Requires:       hdf5-devel
 Requires:       SuperLU-devel
 
 Requires:  atlas-devel