diff --git a/CHANGELOG.md b/CHANGELOG.md
index e69de29bb2d..e7226b0942c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -0,0 +1 @@
+- Fixes issue with updateService in runv2.ts (#9918)
diff --git a/src/gcp/runv2.spec.ts b/src/gcp/runv2.spec.ts
index 683d08ee198..8922d97be63 100644
--- a/src/gcp/runv2.spec.ts
+++ b/src/gcp/runv2.spec.ts
@@ -451,7 +451,7 @@ describe("runv2", () => {
         entryPoint: SERVICE_ID, // No FUNCTION_TARGET_ANNOTATION
         availableMemoryMb: 128,
         cpu: 0.5,
-        eventTrigger: { eventType: "unknown", retry: false },
+        httpsTrigger: {},
         labels: {},
         environmentVariables: {},
         secretEnvironmentVariables: [],
diff --git a/src/gcp/runv2.ts b/src/gcp/runv2.ts
index 4796d3d439b..7ea8b8a77d5 100644
--- a/src/gcp/runv2.ts
+++ b/src/gcp/runv2.ts
@@ -196,7 +196,7 @@ export async function updateService(service: Omit<Service, ServiceOutputFields>)
   );
   // Always update revision name to ensure null generates a new unique revision name.
   fieldMask.push("template.revision");
-  const res = await client.post<Omit<Service, ServiceOutputFields>, LongRunningOperation<Service>>(
+  const res = await client.patch<Omit<Service, ServiceOutputFields>, LongRunningOperation<Service>>(
     service.name,
     service,
     {
@@ -619,7 +619,8 @@ export function endpointFromService(service: Omit<Service, ServiceOutputFields>)
         ? "ALLOW_INTERNAL_AND_GCLB"
         : "ALLOW_ALL") as backend.IngressSettings,
     // TODO: Figure out how to encode all trigger types to the underlying Run service that is compatible with both V2 functions and "direct to run" functions
-    ...(service.annotations?.[TRIGGER_TYPE_ANNOTATION] === "HTTP_TRIGGER"
+    ...(!service.annotations?.[TRIGGER_TYPE_ANNOTATION] ||
+    service.annotations?.[TRIGGER_TYPE_ANNOTATION] === "HTTP_TRIGGER"
       ? { httpsTrigger: {} }
       : {
           eventTrigger: {