diff --git a/.agents/plugins/marketplace.json b/.agents/plugins/marketplace.json
index d9dc5e5..222f622 100644
--- a/.agents/plugins/marketplace.json
+++ b/.agents/plugins/marketplace.json
@@ -163,7 +163,7 @@
       "source": {
         "source": "url",
         "url": "https://github.com/gemini-cli-extensions/spanner.git",
-        "ref": "0.3.1"
+        "ref": "0.3.5"
       },
       "description": "Connect and interact with Spanner data using natural language.",
       "policy": {
diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 126417a..560c352 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -113,7 +113,7 @@
       "source": {
         "source": "github",
         "repo": "gemini-cli-extensions/spanner",
-        "ref": "0.3.1"
+        "ref": "0.3.5"
       },
       "description": "Connect and interact with Spanner data using natural language."
     },
diff --git a/.gitmodules b/.gitmodules
index 6cf5050..1233469 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -29,7 +29,7 @@
 [submodule "spanner"]
 	path = plugins/spanner
 	url = https://github.com/gemini-cli-extensions/spanner
-	branch = 0.3.1
+	branch = 0.3.5
 [submodule "firestore-native"]
 	path = plugins/firestore-native
 	url = https://github.com/gemini-cli-extensions/firestore-native
diff --git a/plugins/spanner b/plugins/spanner
index 23a07b1..290f70f 160000
--- a/plugins/spanner
+++ b/plugins/spanner
@@ -1 +1 @@
-Subproject commit 23a07b1102be32df0ed452cbabb4d07aef29135e
+Subproject commit 290f70f172bb4841a91519b140deb35f97fd4a66