diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42c9068e08..b38a92117e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -298,7 +298,7 @@ else()
         message(FATAL_ERROR "Can not find BLAS or LAPACK!  These are required for Armadillo.  Please install one of them---or install Armadillo---before installing mlpack.")
       endif()
     endif()
-    get_deps(https://files.mlpack.org/armadillo-10.3.0.tar.gz armadillo armadillo-10.3.0.tar.gz)
+    get_deps(https://files.mlpack.org/armadillo-12.6.5.tar.gz armadillo armadillo-12.6.5.tar.gz)
     set(ARMADILLO_INCLUDE_DIR ${GENERIC_INCLUDE_DIR})
     find_package(Armadillo REQUIRED)
   endif()