diff --git a/dist/index.js b/dist/index.js
index 02c8de4..735c586 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -80956,6 +80956,7 @@ class Manifest {
             (manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.releaseLabels) || exports.DEFAULT_RELEASE_LABELS;
         this.labels = (manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.labels) || exports.DEFAULT_LABELS;
         this.skipLabeling = (manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.skipLabeling) || false;
+        this.sequentialCalls = (manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.sequentialCalls) || false;
         this.snapshotLabels =
             (manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.snapshotLabels) || exports.DEFAULT_SNAPSHOT_LABELS;
         this.bootstrapSha = manifestOptions === null || manifestOptions === void 0 ? void 0 : manifestOptions.bootstrapSha;
@@ -81277,7 +81278,7 @@ class Manifest {
     /**
      * Opens/updates all candidate release pull requests for this repository.
      *
-     * @returns {number[]} Pull request numbers of release pull requests
+     * @returns {PullRequest[]} Pull request numbers of release pull requests
      */
     async createPullRequests() {
         const candidatePullRequests = await this.buildPullRequests();
@@ -81294,13 +81295,24 @@ class Manifest {
         // collect open and snoozed release pull requests
         const openPullRequests = await this.findOpenReleasePullRequests();
         const snoozedPullRequests = await this.findSnoozedReleasePullRequests();
-        const promises = [];
-        for (const pullRequest of candidatePullRequests) {
-            promises.push(this.createOrUpdatePullRequest(pullRequest, openPullRequests, snoozedPullRequests));
+        if (this.sequentialCalls) {
+            const pullRequests = [];
+            for (const pullRequest of candidatePullRequests) {
+                const resultPullRequest = await this.createOrUpdatePullRequest(pullRequest, openPullRequests, snoozedPullRequests);
+                if (resultPullRequest)
+                    pullRequests.push(resultPullRequest);
+            }
+            return pullRequests;
+        }
+        else {
+            const promises = [];
+            for (const pullRequest of candidatePullRequests) {
+                promises.push(this.createOrUpdatePullRequest(pullRequest, openPullRequests, snoozedPullRequests));
+            }
+            const pullNumbers = await Promise.all(promises);
+            // reject any pull numbers that were not created or updated
+            return pullNumbers.filter(number => !!number);
         }
-        const pullNumbers = await Promise.all(promises);
-        // reject any pull numbers that were not created or updated
-        return pullNumbers.filter(number => !!number);
     }
     async findOpenReleasePullRequests() {
         logger_1.logger.info('Looking for open release pull requests');
@@ -81450,12 +81462,22 @@ class Manifest {
                 releasesByPullRequest[release.pullRequest.number] = [release];
             }
         }
-        const promises = [];
-        for (const pullNumber in releasesByPullRequest) {
-            promises.push(this.createReleasesForPullRequest(releasesByPullRequest[pullNumber], pullRequestsByNumber[pullNumber]));
+        if (this.sequentialCalls) {
+            const resultReleases = [];
+            for (const pullNumber in releasesByPullRequest) {
+                const releases = await this.createReleasesForPullRequest(releasesByPullRequest[pullNumber], pullRequestsByNumber[pullNumber]);
+                resultReleases.concat(releases);
+            }
+            return resultReleases;
+        }
+        else {
+            const promises = [];
+            for (const pullNumber in releasesByPullRequest) {
+                promises.push(this.createReleasesForPullRequest(releasesByPullRequest[pullNumber], pullRequestsByNumber[pullNumber]));
+            }
+            const releases = await Promise.all(promises);
+            return releases.reduce((collection, r) => collection.concat(r), []);
         }
-        const releases = await Promise.all(promises);
-        return releases.reduce((collection, r) => collection.concat(r), []);
     }
     async createReleasesForPullRequest(releases, pullRequest) {
         // create the release
@@ -81608,6 +81630,7 @@ async function parseConfig(github, configFile, branch, onlyPath, releaseAs) {
         snapshotLabels: configSnapshotLabel === undefined ? undefined : [configSnapshotLabel],
         releaseSearchDepth: config['release-search-depth'],
         commitSearchDepth: config['commit-search-depth'],
+        sequentialCalls: config['sequential-calls'],
     };
     return { config: repositoryConfig, options: manifestOptions };
 }
@@ -113437,7 +113460,7 @@ module.exports = {};
 /***/ ((module) => {
 
 "use strict";
-module.exports = {"i8":"13.13.0"};
+module.exports = {"i8":"13.14.0"};
 
 /***/ }),