diff --git a/scripts/prepare-jdk.sh b/scripts/prepare-jdk.sh
index 07890a9514084edf6b305ac79a17c620e10aa692..bee4f24dcc83c0957f158bca519ccc45347634be 100644
--- a/scripts/prepare-jdk.sh
+++ b/scripts/prepare-jdk.sh
@@ -32,7 +32,7 @@ jdks_install_by_sdkman=(
     12.0.2-open
     13.0.3-zulu
     14.0.1-zulu
-    15.ea.20-open
+    15.ea.26-open
 )
 java_home_var_names=()
 
@@ -53,7 +53,9 @@ exportJdkVarAndInstall() {
 
         # install jdk by sdkman
         if [ ! -d "$jdkHomePath" ]; then
+            set +u
             runCmd sdk install java "$jdkNameOfSdkman" || die "fail to install jdk $jdkNameOfSdkman by sdkman"
+            set -u
         fi
     done