diff --git a/.kokoro/dependencies.sh b/.kokoro/dependencies.sh
index a7e999d..9030ba8 100755
--- a/.kokoro/dependencies.sh
+++ b/.kokoro/dependencies.sh
@@ -14,6 +14,7 @@
 # limitations under the License.
 
 set -eo pipefail
+shopt -s nullglob
 
 ## Get the directory of the build script
 scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))
diff --git a/synth.metadata b/synth.metadata
index c2a2a83..b9f1885 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-accesscontextmanager.git",
-        "sha": "63dae8d96eeb6ceb9aa26c4dcb04048574528a54"
+        "sha": "c4988457285ced92a837d2822b454d05f8c09940"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1c0c698705e668ccb3d68556ae7260f16ce63a6e"
+        "sha": "87254ac89a9559864c0a245d6b150406439ce3d8"
       }
     }
   ],