diff --git a/arkanum b/arkanum
index ee70824..7623c4e 100755
--- a/arkanum
+++ b/arkanum
@@ -120,7 +120,7 @@ function instDotNet() {
 
 function instGoLang() {
   if [[ -z "$1" ]]; then
-    GOVERSION="1.20.6"
+    GOVERSION="1.21.5"
   else
     GOVERSION="$1"
   fi