diff --git a/functions/v2/datastore/hello-datastore/requirements.txt b/functions/v2/datastore/hello-datastore/requirements.txt
index 35e86dbfbc5..4c293591bf6 100644
--- a/functions/v2/datastore/hello-datastore/requirements.txt
+++ b/functions/v2/datastore/hello-datastore/requirements.txt
@@ -2,5 +2,5 @@ functions-framework==3.9.2
 google-events==0.14.0
 google-cloud-datastore==2.20.2
 google-api-core==2.17.1
-protobuf==4.25.8
+protobuf==5.29.6
 cloudevents==1.11.0
diff --git a/functions/v2/firebase/hello-firestore/requirements.txt b/functions/v2/firebase/hello-firestore/requirements.txt
index b2d03f648de..200ce86a155 100644
--- a/functions/v2/firebase/hello-firestore/requirements.txt
+++ b/functions/v2/firebase/hello-firestore/requirements.txt
@@ -1,5 +1,5 @@
 functions-framework==3.9.2
 google-events==0.14.0
 google-api-core==2.17.1
-protobuf==4.25.6
+protobuf==5.29.6
 cloudevents==1.11.0
\ No newline at end of file
diff --git a/functions/v2/firebase/upper-firestore/requirements.txt b/functions/v2/firebase/upper-firestore/requirements.txt
index cc5c66225f4..1778489d533 100644
--- a/functions/v2/firebase/upper-firestore/requirements.txt
+++ b/functions/v2/firebase/upper-firestore/requirements.txt
@@ -1,6 +1,6 @@
 functions-framework==3.9.2
 google-events==0.14.0
 google-api-core==2.17.1
-protobuf==4.25.6
+protobuf==5.29.6
 google-cloud-firestore==2.19.0
 cloudevents==1.11.0
\ No newline at end of file
diff --git a/gemma2/requirements.txt b/gemma2/requirements.txt
index f8990233d3f..e35e68d64c5 100644
--- a/gemma2/requirements.txt
+++ b/gemma2/requirements.txt
@@ -1,2 +1,2 @@
 google-cloud-aiplatform[all]==1.64.0
-protobuf==5.29.5
+protobuf==5.29.6
diff --git a/managedkafka/snippets/connect/clusters/requirements.txt b/managedkafka/snippets/connect/clusters/requirements.txt
index 5f372e81c41..f94f1fd9749 100644
--- a/managedkafka/snippets/connect/clusters/requirements.txt
+++ b/managedkafka/snippets/connect/clusters/requirements.txt
@@ -1,4 +1,4 @@
-protobuf==5.29.4
+protobuf==5.29.6
 pytest==8.2.2
 google-api-core==2.23.0
 google-auth==2.38.0
diff --git a/managedkafka/snippets/requirements.txt b/managedkafka/snippets/requirements.txt
index 5f372e81c41..f94f1fd9749 100644
--- a/managedkafka/snippets/requirements.txt
+++ b/managedkafka/snippets/requirements.txt
@@ -1,4 +1,4 @@
-protobuf==5.29.4
+protobuf==5.29.6
 pytest==8.2.2
 google-api-core==2.23.0
 google-auth==2.38.0
diff --git a/secretmanager/snippets/requirements.txt b/secretmanager/snippets/requirements.txt
index 1e166fd6814..673c1f03407 100644
--- a/secretmanager/snippets/requirements.txt
+++ b/secretmanager/snippets/requirements.txt
@@ -1,4 +1,4 @@
 google-cloud-resource-manager==1.14.2
 google-cloud-secret-manager==2.24.0
 google-crc32c==1.6.0
-protobuf==5.29.4
+protobuf==5.29.6