diff --git a/update.sh b/update.sh
index 4a627d0..831c4b2 100755
--- a/update.sh
+++ b/update.sh
@@ -94,7 +94,7 @@ variants=(
   fpm-alpine
 )
 
-min_version='2021.04'
+min_version='2021.09'
 
 # version_greater_or_equal A B returns whether A >= B
 function version_greater_or_equal() {