diff --git a/src/helpers/SimApiStorage.cj b/src/helpers/SimApiStorage.cj
index ca1293a..fb9c2a2 100644
--- a/src/helpers/SimApiStorage.cj
+++ b/src/helpers/SimApiStorage.cj
@@ -207,8 +207,8 @@ public class SimApiStorage {
         let dateStamp = amzDate[0..8]
         let payloadHash = toHexString(sha256Bytes(data))
         let canonicalUri = "/${_bucket}/${uriEncode(object, false)}"
-        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\n"
-        let signedHeaders = "host;x-amz-content-sha256"
+        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\nx-amz-date:${amzDate}\n"
+        let signedHeaders = "host;x-amz-content-sha256;x-amz-date"
         let canonicalRequest = "PUT\n${canonicalUri}\n\n${canonicalHeaders}\n${signedHeaders}\n${payloadHash}"
         let stringToSign = "AWS4-HMAC-SHA256\n${amzDate}\n${dateStamp}/${_region}/s3/aws4_request\n" +
             "${toHexString(sha256Bytes(canonicalRequest.toArray()))}"
@@ -218,9 +218,11 @@ public class SimApiStorage {
         try {
             let request = HttpRequestMessage(NetHttpMethod.Put, "${_endpoint}${canonicalUri}")
             request.headers.add("x-amz-content-sha256", payloadHash)
+            request.headers.add("x-amz-date", amzDate)
             request.headers.add("Authorization", authorization)
-            request.headers.add("Content-Type", contentType)
-            request.content = ByteArrayContent(data)
+            let content = ByteArrayContent(data)
+            content.headers.add("Content-Type", contentType)
+            request.content = content
             let response = client.send(request)
             try {
                 SimApiError.errorWhenFalse(response.isSuccessStatusCode, code: response.statusCode,
@@ -240,8 +242,8 @@ public class SimApiStorage {
         let dateStamp = amzDate[0..8]
         let payloadHash = toHexString(sha256Bytes(Array<Byte>(0, repeat: 0)))
         let canonicalUri = "/${_bucket}"
-        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\n"
-        let signedHeaders = "host;x-amz-content-sha256"
+        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\nx-amz-date:${amzDate}\n"
+        let signedHeaders = "host;x-amz-content-sha256;x-amz-date"
         let canonicalRequest = "HEAD\n${canonicalUri}\n\n${canonicalHeaders}\n${signedHeaders}\n${payloadHash}"
         let stringToSign = "AWS4-HMAC-SHA256\n${amzDate}\n${dateStamp}/${_region}/s3/aws4_request\n" +
             "${toHexString(sha256Bytes(canonicalRequest.toArray()))}"
@@ -251,6 +253,7 @@ public class SimApiStorage {
         try {
             let request = HttpRequestMessage(NetHttpMethod.Head, "${_endpoint}${canonicalUri}")
             request.headers.add("x-amz-content-sha256", payloadHash)
+            request.headers.add("x-amz-date", amzDate)
             request.headers.add("Authorization", authorization)
             let response = client.send(request)
             try {
@@ -270,8 +273,8 @@ public class SimApiStorage {
         let dateStamp = amzDate[0..8]
         let payloadHash = toHexString(sha256Bytes(Array<Byte>(0, repeat: 0)))
         let canonicalUri = "/${_bucket}"
-        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\n"
-        let signedHeaders = "host;x-amz-content-sha256"
+        let canonicalHeaders = "host:${_host}\nx-amz-content-sha256:${payloadHash}\nx-amz-date:${amzDate}\n"
+        let signedHeaders = "host;x-amz-content-sha256;x-amz-date"
         let canonicalRequest = "PUT\n${canonicalUri}\n\n${canonicalHeaders}\n${signedHeaders}\n${payloadHash}"
         let stringToSign = "AWS4-HMAC-SHA256\n${amzDate}\n${dateStamp}/${_region}/s3/aws4_request\n" +
             "${toHexString(sha256Bytes(canonicalRequest.toArray()))}"
@@ -281,6 +284,7 @@ public class SimApiStorage {
         try {
             let request = HttpRequestMessage(NetHttpMethod.Put, "${_endpoint}${canonicalUri}")
             request.headers.add("x-amz-content-sha256", payloadHash)
+            request.headers.add("x-amz-date", amzDate)
             request.headers.add("Authorization", authorization)
             request.content = ByteArrayContent(Array<Byte>(0, repeat: 0))
             let response = client.send(request)