diff --git a/install.sh b/install.sh
index 005050a525a1972f4c41859726c3e372094fc325..a3d7248c7f4b4fb45f265b5ff5ba71c83027d42d 100644
--- a/install.sh
+++ b/install.sh
@@ -11,7 +11,7 @@ if [ -z "$UCOIN_DIR" ]; then
 fi
 
 ucoin_latest_version() {
-  echo "v0.20.0a39"
+  echo "v0.20.0a40"
 }
 
 ucoin_repo_url() {