diff --git a/plugins/caches.js b/plugins/caches.js
index d8d5500..6581883 100644
--- a/plugins/caches.js
+++ b/plugins/caches.js
@@ -291,6 +291,28 @@ exports.plugin = {
                             id: SCHEMA_SCOPE_ID,
                             cacheName: SCHEMA_CACHE_NAME
                         })
+                    },
+                    ext: {
+                        onPreAuth: {
+                            method: (request, h) => {
+                                const contentLength = request.headers['content-length'];
+                                const expectHeader = request.headers.expect;
+
+                                if (expectHeader && expectHeader.toLowerCase() === '100-continue') {
+                                    if (contentLength && parseInt(contentLength, 10) > options.maxByteSize) {
+                                        request.log(
+                                            'Payload content length greater than maximum allowed',
+                                            options.maxByteSize
+                                        );
+                                        throw boom.entityTooLarge();
+                                    }
+
+                                    request.raw.res.writeContinue();
+                                }
+
+                                return h.continue;
+                            }
+                        }
                     }
                 }
             },
diff --git a/test/plugins/caches.test.js b/test/plugins/caches.test.js
index 9f249bd..9cf631b 100644
--- a/test/plugins/caches.test.js
+++ b/test/plugins/caches.test.js
@@ -847,7 +847,7 @@ describe('caches plugin test using s3', () => {
                 plugin,
                 options: {
                     expiresInSec: '100',
-                    maxByteSize: '5368709120'
+                    maxByteSize: 10 * 1024 * 1024
                 }
             })
             .then(() => server.start());
@@ -931,6 +931,7 @@ describe('caches plugin test using s3', () => {
                 headers: {
                     'x-foo': 'bar',
                     'content-type': 'text/plain',
+                    expect: '100-continue',
                     ignore: 'true'
                 },
                 auth: {
@@ -978,6 +979,23 @@ describe('caches plugin test using s3', () => {
 
             assert.equal(putResponse.statusCode, 503);
         });
+
+        it('returns 100 Continue if Expect header is set and payload size is within limit', async () => {
+            options.url = `/caches/events/${mockEventID}/foo`;
+
+            const putResponse = await server.inject(options);
+
+            assert.equal(putResponse.statusCode, 202);
+        });
+
+        it('returns 413 if Expect header is set and payload size exceeds limit', async () => {
+            options.url = `/caches/events/${mockEventID}/foo`;
+            options.payload = 'A'.repeat(1024 * 1024 * 11);
+
+            const putResponse = await server.inject(options);
+
+            assert.equal(putResponse.statusCode, 413);
+        });
     });
 
     describe('DELETE /caches/:scope/:id', () => {