diff --git a/arkanum b/arkanum
index 4262f2a..6aa1e4e 100755
--- a/arkanum
+++ b/arkanum
@@ -121,7 +121,7 @@ function instDotNet() {
 
 function instGoLang() {
   if [[ -z "$1" ]]; then
-    GOVERSION="1.20.6"
+    GOVERSION="1.21.5"
   else
     GOVERSION="$1"
   fi