diff --git a/.changeset/poor-poems-allow.md b/.changeset/poor-poems-allow.md
new file mode 100644
index 0000000000..b82a762b83
--- /dev/null
+++ b/.changeset/poor-poems-allow.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-cloudbuild': patch
+---
+
+Fixed bug in the CloudbuildClient reRunWorkflow fetch call. The method in the fetch request was not specified and defaulted to a GET. Method is now explicitly set to POST with this change.
diff --git a/plugins/cloudbuild/src/api/CloudbuildClient.ts b/plugins/cloudbuild/src/api/CloudbuildClient.ts
index 035b20f63d..cb6747e803 100644
--- a/plugins/cloudbuild/src/api/CloudbuildClient.ts
+++ b/plugins/cloudbuild/src/api/CloudbuildClient.ts
@@ -34,6 +34,7 @@ export class CloudbuildClient implements CloudbuildApi {
         options.projectId,
       )}/builds/${encodeURIComponent(options.runId)}:retry`,
       {
+        method: 'POST',
         headers: new Headers({
           Accept: '*/*',
           Authorization: `Bearer ${await this.getToken()}`,