diff --git a/.go-version b/.go-version
index c262b1f0df..ce2dd53570 100644
--- a/.go-version
+++ b/.go-version
@@ -1 +1 @@
-1.21.6
+1.21.5
diff --git a/changelog/_go-ver-1160.txt b/changelog/_go-ver-1160.txt
index 2b985cf4d8..3b7b96eb0d 100644
--- a/changelog/_go-ver-1160.txt
+++ b/changelog/_go-ver-1160.txt
@@ -1,3 +1,3 @@
 ```release-note:change
-core: Bump Go version to 1.21.6.
+core: Bump Go version to 1.21.5.
 ```