diff --git a/examples/cloud_run_cloud_events/requirements.txt b/examples/cloud_run_cloud_events/requirements.txt
index 0a7427c7..43d925f1 100644
--- a/examples/cloud_run_cloud_events/requirements.txt
+++ b/examples/cloud_run_cloud_events/requirements.txt
@@ -1,3 +1,3 @@
 # Optionally include additional dependencies here
-cloudevents>=1.2.0
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
 requests
diff --git a/examples/cloud_run_decorator/requirements.txt b/examples/cloud_run_decorator/requirements.txt
index 33c5f99f..3f8c88a5 100644
--- a/examples/cloud_run_decorator/requirements.txt
+++ b/examples/cloud_run_decorator/requirements.txt
@@ -1 +1,2 @@
 # Optionally include additional dependencies here
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
diff --git a/examples/cloud_run_event/requirements.txt b/examples/cloud_run_event/requirements.txt
index 33c5f99f..3f8c88a5 100644
--- a/examples/cloud_run_event/requirements.txt
+++ b/examples/cloud_run_event/requirements.txt
@@ -1 +1,2 @@
 # Optionally include additional dependencies here
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
diff --git a/examples/cloud_run_http/requirements.txt b/examples/cloud_run_http/requirements.txt
index 33c5f99f..3f8c88a5 100644
--- a/examples/cloud_run_http/requirements.txt
+++ b/examples/cloud_run_http/requirements.txt
@@ -1 +1,2 @@
 # Optionally include additional dependencies here
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
diff --git a/examples/docker-compose/requirements.txt b/examples/docker-compose/requirements.txt
index 3601409f..c856b8d8 100644
--- a/examples/docker-compose/requirements.txt
+++ b/examples/docker-compose/requirements.txt
@@ -1 +1,2 @@
 # Add any Python requirements here
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
diff --git a/examples/skaffold/requirements.txt b/examples/skaffold/requirements.txt
index 3601409f..c856b8d8 100644
--- a/examples/skaffold/requirements.txt
+++ b/examples/skaffold/requirements.txt
@@ -1 +1,2 @@
 # Add any Python requirements here
+cloudevents==1.11.0  # Pin version - last version compatible w/ python3.7
diff --git a/pyproject.toml b/pyproject.toml
index c160562f..fa001304 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,10 @@ readme = "README.md"
 requires-python = ">=3.5, <4"
 # Once we drop support for Python 3.7 and 3.8, this can become
 # license = "Apache-2.0"
-license = {text = "Apache-2.0"}
-authors = [
-  { name = "Google LLC", email = "googleapis-packages@google.com" }
-]
+license = { text = "Apache-2.0" }
+authors = [{ name = "Google LLC", email = "googleapis-packages@google.com" }]
 maintainers = [
-  { name = "Google LLC", email = "googleapis-packages@google.com" }
+  { name = "Google LLC", email = "googleapis-packages@google.com" },
 ]
 keywords = ["functions-framework"]
 classifiers = [
@@ -29,7 +27,7 @@ dependencies = [
   "click>=7.0,<9.0",
   "watchdog>=1.0.0",
   "gunicorn>=22.0.0; platform_system!='Windows'",
-  "cloudevents>=1.2.0,<2.0.0",
+  "cloudevents>=1.2.0,<=1.11.0",                  # Must support python 3.7
   "Werkzeug>=0.14,<4.0.0",
 ]