diff --git a/eventarc/audit-storage/requirements.txt b/eventarc/audit-storage/requirements.txt
index fcbf5097b8c..2880888d3ae 100644
--- a/eventarc/audit-storage/requirements.txt
+++ b/eventarc/audit-storage/requirements.txt
@@ -1,3 +1,3 @@
 Flask==3.0.3
 gunicorn==23.0.0
-cloudevents==1.11.0
+cloudevents==2.0.0
diff --git a/eventarc/audit_iam/requirements.txt b/eventarc/audit_iam/requirements.txt
index 11317349789..b1643e04602 100644
--- a/eventarc/audit_iam/requirements.txt
+++ b/eventarc/audit_iam/requirements.txt
@@ -1,5 +1,5 @@
 Flask==3.0.3
 gunicorn==23.0.0
 google-events==0.14.0
-cloudevents==1.11.0
+cloudevents==2.0.0
 googleapis-common-protos==1.66.0
diff --git a/eventarc/storage_handler/requirements.txt b/eventarc/storage_handler/requirements.txt
index f54b23da042..a349edb4fdc 100644
--- a/eventarc/storage_handler/requirements.txt
+++ b/eventarc/storage_handler/requirements.txt
@@ -1,4 +1,4 @@
 Flask==3.0.3
 gunicorn==23.0.0
 google-events==0.14.0
-cloudevents==1.11.0
+cloudevents==2.0.0
diff --git a/functions/billing_stop_on_notification/requirements-test.txt b/functions/billing_stop_on_notification/requirements-test.txt
index 66801836e20..cc2849e6762 100644
--- a/functions/billing_stop_on_notification/requirements-test.txt
+++ b/functions/billing_stop_on_notification/requirements-test.txt
@@ -1,2 +1,2 @@
 pytest==8.3.5
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/audit_log/requirements-test.txt b/functions/v2/audit_log/requirements-test.txt
index 6e4d1d97ce0..9dc2edbcf8f 100644
--- a/functions/v2/audit_log/requirements-test.txt
+++ b/functions/v2/audit_log/requirements-test.txt
@@ -1,2 +1,2 @@
 pytest==8.2.0
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/datastore/hello-datastore/requirements.txt b/functions/v2/datastore/hello-datastore/requirements.txt
index 35e86dbfbc5..26b4aa3cdd5 100644
--- a/functions/v2/datastore/hello-datastore/requirements.txt
+++ b/functions/v2/datastore/hello-datastore/requirements.txt
@@ -3,4 +3,4 @@ google-events==0.14.0
 google-cloud-datastore==2.20.2
 google-api-core==2.17.1
 protobuf==4.25.8
-cloudevents==1.11.0
+cloudevents==2.0.0
diff --git a/functions/v2/firebase/hello-firestore/requirements.txt b/functions/v2/firebase/hello-firestore/requirements.txt
index b2d03f648de..645c2425b53 100644
--- a/functions/v2/firebase/hello-firestore/requirements.txt
+++ b/functions/v2/firebase/hello-firestore/requirements.txt
@@ -2,4 +2,4 @@ functions-framework==3.9.2
 google-events==0.14.0
 google-api-core==2.17.1
 protobuf==4.25.6
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/firebase/hello-remote-config/requirements.txt b/functions/v2/firebase/hello-remote-config/requirements.txt
index 7404d8b7887..f0d1a2b1d98 100644
--- a/functions/v2/firebase/hello-remote-config/requirements.txt
+++ b/functions/v2/firebase/hello-remote-config/requirements.txt
@@ -1,2 +1,2 @@
 functions-framework==3.9.2
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/firebase/hello-rtdb/requirements.txt b/functions/v2/firebase/hello-rtdb/requirements.txt
index 7404d8b7887..f0d1a2b1d98 100644
--- a/functions/v2/firebase/hello-rtdb/requirements.txt
+++ b/functions/v2/firebase/hello-rtdb/requirements.txt
@@ -1,2 +1,2 @@
 functions-framework==3.9.2
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ 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..75677c8b950 100644
--- a/functions/v2/firebase/upper-firestore/requirements.txt
+++ b/functions/v2/firebase/upper-firestore/requirements.txt
@@ -3,4 +3,4 @@ google-events==0.14.0
 google-api-core==2.17.1
 protobuf==4.25.6
 google-cloud-firestore==2.19.0
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/label_gce_instance/requirements-test.txt b/functions/v2/label_gce_instance/requirements-test.txt
index 241f2ead47a..91ca338aac5 100644
--- a/functions/v2/label_gce_instance/requirements-test.txt
+++ b/functions/v2/label_gce_instance/requirements-test.txt
@@ -1,4 +1,4 @@
 pytest==8.2.0
 backoff==2.2.1; python_version < "3.7"
 backoff==2.2.1; python_version >= "3.7"
-cloudevents==1.11.0
+cloudevents==2.0.0
diff --git a/functions/v2/ocr/requirements-test.txt b/functions/v2/ocr/requirements-test.txt
index 8c11dec956d..719c6c883f9 100644
--- a/functions/v2/ocr/requirements-test.txt
+++ b/functions/v2/ocr/requirements-test.txt
@@ -1,2 +1,2 @@
-cloudevents==1.11.0
+cloudevents==2.0.0
 pytest==8.2.0
diff --git a/functions/v2/storage/requirements-test.txt b/functions/v2/storage/requirements-test.txt
index 6e4d1d97ce0..9dc2edbcf8f 100644
--- a/functions/v2/storage/requirements-test.txt
+++ b/functions/v2/storage/requirements-test.txt
@@ -1,2 +1,2 @@
 pytest==8.2.0
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file
diff --git a/functions/v2/storage/requirements.txt b/functions/v2/storage/requirements.txt
index 7404d8b7887..f0d1a2b1d98 100644
--- a/functions/v2/storage/requirements.txt
+++ b/functions/v2/storage/requirements.txt
@@ -1,2 +1,2 @@
 functions-framework==3.9.2
-cloudevents==1.11.0
\ No newline at end of file
+cloudevents==2.0.0
\ No newline at end of file