diff --git a/README.md b/README.md
index c0b9ae0..0ee137c 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@ Be aware of S3 transfer costs if your runners are not in the same AWS region as
 ## Special environment variables
 
 * `RUNS_ON_S3_BUCKET_CACHE`: if set, the action will use this bucket to store the cache.
+* `RUNS_ON_S3_BUCKET_ENDPOINT`: if set, the action will use this endpoint to connect to the bucket. This is useful if you are using AWS's S3 transfer acceleration or a non-AWS S3-compatible service.
 * `RUNS_ON_RUNNER_NAME`: when running on RunsOn, where this environment variable is non-empty, existing AWS credentials from the environment will be discarded. If you want to preserve existing environment variables, set this to the empty string `""`.
 * `RUNS_ON_S3_FORCE_PATH_STYLE` or `AWS_S3_FORCE_PATH_STYLE`: if one of those environment variables equals the string `"true"`, then the S3 client will be configured to force the path style.
 
diff --git a/dist/restore-only/index.js b/dist/restore-only/index.js
index bba89d9..9aaa4cb 100644
--- a/dist/restore-only/index.js
+++ b/dist/restore-only/index.js
@@ -93784,6 +93784,7 @@ if (process.env.RUNS_ON_RUNNER_NAME && process.env.RUNS_ON_RUNNER_NAME !== "") {
 }
 const versionSalt = "1.0";
 const bucketName = process.env.RUNS_ON_S3_BUCKET_CACHE;
+const endpoint = process.env.RUNS_ON_S3_BUCKET_ENDPOINT;
 const region = process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
     process.env.AWS_DEFAULT_REGION;
@@ -93793,7 +93794,7 @@ const uploadQueueSize = Number(process.env.UPLOAD_QUEUE_SIZE || "4");
 const uploadPartSize = Number(process.env.UPLOAD_PART_SIZE || "32") * 1024 * 1024;
 const downloadQueueSize = Number(process.env.DOWNLOAD_QUEUE_SIZE || "8");
 const downloadPartSize = Number(process.env.DOWNLOAD_PART_SIZE || "16") * 1024 * 1024;
-const s3Client = new client_s3_1.S3Client({ region, forcePathStyle });
+const s3Client = new client_s3_1.S3Client({ region, forcePathStyle, endpoint });
 function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
     // don't pass changes upstream
     const components = paths.slice();
diff --git a/dist/restore/index.js b/dist/restore/index.js
index 5795956..10f3788 100644
--- a/dist/restore/index.js
+++ b/dist/restore/index.js
@@ -93784,6 +93784,7 @@ if (process.env.RUNS_ON_RUNNER_NAME && process.env.RUNS_ON_RUNNER_NAME !== "") {
 }
 const versionSalt = "1.0";
 const bucketName = process.env.RUNS_ON_S3_BUCKET_CACHE;
+const endpoint = process.env.RUNS_ON_S3_BUCKET_ENDPOINT;
 const region = process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
     process.env.AWS_DEFAULT_REGION;
@@ -93793,7 +93794,7 @@ const uploadQueueSize = Number(process.env.UPLOAD_QUEUE_SIZE || "4");
 const uploadPartSize = Number(process.env.UPLOAD_PART_SIZE || "32") * 1024 * 1024;
 const downloadQueueSize = Number(process.env.DOWNLOAD_QUEUE_SIZE || "8");
 const downloadPartSize = Number(process.env.DOWNLOAD_PART_SIZE || "16") * 1024 * 1024;
-const s3Client = new client_s3_1.S3Client({ region, forcePathStyle });
+const s3Client = new client_s3_1.S3Client({ region, forcePathStyle, endpoint });
 function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
     // don't pass changes upstream
     const components = paths.slice();
diff --git a/dist/save-only/index.js b/dist/save-only/index.js
index 7ab2a86..c83ae6c 100644
--- a/dist/save-only/index.js
+++ b/dist/save-only/index.js
@@ -93784,6 +93784,7 @@ if (process.env.RUNS_ON_RUNNER_NAME && process.env.RUNS_ON_RUNNER_NAME !== "") {
 }
 const versionSalt = "1.0";
 const bucketName = process.env.RUNS_ON_S3_BUCKET_CACHE;
+const endpoint = process.env.RUNS_ON_S3_BUCKET_ENDPOINT;
 const region = process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
     process.env.AWS_DEFAULT_REGION;
@@ -93793,7 +93794,7 @@ const uploadQueueSize = Number(process.env.UPLOAD_QUEUE_SIZE || "4");
 const uploadPartSize = Number(process.env.UPLOAD_PART_SIZE || "32") * 1024 * 1024;
 const downloadQueueSize = Number(process.env.DOWNLOAD_QUEUE_SIZE || "8");
 const downloadPartSize = Number(process.env.DOWNLOAD_PART_SIZE || "16") * 1024 * 1024;
-const s3Client = new client_s3_1.S3Client({ region, forcePathStyle });
+const s3Client = new client_s3_1.S3Client({ region, forcePathStyle, endpoint });
 function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
     // don't pass changes upstream
     const components = paths.slice();
diff --git a/dist/save/index.js b/dist/save/index.js
index ed920df..b8e3006 100644
--- a/dist/save/index.js
+++ b/dist/save/index.js
@@ -93784,6 +93784,7 @@ if (process.env.RUNS_ON_RUNNER_NAME && process.env.RUNS_ON_RUNNER_NAME !== "") {
 }
 const versionSalt = "1.0";
 const bucketName = process.env.RUNS_ON_S3_BUCKET_CACHE;
+const endpoint = process.env.RUNS_ON_S3_BUCKET_ENDPOINT;
 const region = process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
     process.env.AWS_DEFAULT_REGION;
@@ -93793,7 +93794,7 @@ const uploadQueueSize = Number(process.env.UPLOAD_QUEUE_SIZE || "4");
 const uploadPartSize = Number(process.env.UPLOAD_PART_SIZE || "32") * 1024 * 1024;
 const downloadQueueSize = Number(process.env.DOWNLOAD_QUEUE_SIZE || "8");
 const downloadPartSize = Number(process.env.DOWNLOAD_PART_SIZE || "16") * 1024 * 1024;
-const s3Client = new client_s3_1.S3Client({ region, forcePathStyle });
+const s3Client = new client_s3_1.S3Client({ region, forcePathStyle, endpoint });
 function getCacheVersion(paths, compressionMethod, enableCrossOsArchive = false) {
     // don't pass changes upstream
     const components = paths.slice();
diff --git a/src/custom/backend.ts b/src/custom/backend.ts
index cb01941..a9146be 100644
--- a/src/custom/backend.ts
+++ b/src/custom/backend.ts
@@ -36,6 +36,7 @@ if (process.env.RUNS_ON_RUNNER_NAME && process.env.RUNS_ON_RUNNER_NAME !== "") {
 
 const versionSalt = "1.0";
 const bucketName = process.env.RUNS_ON_S3_BUCKET_CACHE;
+const endpoint = process.env.RUNS_ON_S3_BUCKET_ENDPOINT;
 const region =
     process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
@@ -51,7 +52,7 @@ const downloadQueueSize = Number(process.env.DOWNLOAD_QUEUE_SIZE || "8");
 const downloadPartSize =
     Number(process.env.DOWNLOAD_PART_SIZE || "16") * 1024 * 1024;
 
-const s3Client = new S3Client({ region, forcePathStyle });
+const s3Client = new S3Client({ region, forcePathStyle, endpoint });
 
 export function getCacheVersion(
     paths: string[],