diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f83c2e..a55a82e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 0.4.8
+- Change the version of OpenBLAS to be downloaded to 0.3.21.
+
 ## 0.4.7
 - Refactor codes and configs with RuboCop.
 
diff --git a/lib/numo/openblas/version.rb b/lib/numo/openblas/version.rb
index a6c0b66..98ebe79 100644
--- a/lib/numo/openblas/version.rb
+++ b/lib/numo/openblas/version.rb
@@ -5,6 +5,6 @@ module Numo
   # Numo::OpenBLAS loads Numo::NArray and Linalg with OpenBLAS used as backend library.
   module OpenBLAS
     # The version of Numo::OpenBLAS you install.
-    VERSION = '0.4.7'
+    VERSION = '0.4.8'
   end
 end