diff --git a/README.md b/README.md
index 1624a7371..512288f07 100644
--- a/README.md
+++ b/README.md
@@ -12,19 +12,19 @@ Java 1.8 or above.
 <dependency>
     <groupId>io.minio</groupId>
     <artifactId>minio</artifactId>
-    <version>8.5.11</version>
+    <version>8.5.12</version>
 </dependency>
 ```
 
 ## Gradle usage
 ```
 dependencies {
-    implementation("io.minio:minio:8.5.11")
+    implementation("io.minio:minio:8.5.12")
 }
 ```
 
 ## JAR download
-The latest JAR can be downloaded from [here](https://repo1.maven.org/maven2/io/minio/minio/8.5.11/)
+The latest JAR can be downloaded from [here](https://repo1.maven.org/maven2/io/minio/minio/8.5.12/)
 
 ## Quick Start Example - File Uploader
 This example program connects to an object storage server, makes a bucket on the server and then uploads a file to the bucket.
@@ -92,12 +92,12 @@ public class FileUploader {
 
 #### Compile FileUploader
 ```sh
-$ javac -cp minio-8.5.11-all.jar FileUploader.java
+$ javac -cp minio-8.5.12-all.jar FileUploader.java
 ```
 
 #### Run FileUploader
 ```sh
-$ java -cp minio-8.5.11-all.jar:. FileUploader
+$ java -cp minio-8.5.12-all.jar:. FileUploader
 '/home/user/Photos/asiaphotos.zip' is successfully uploaded as object 'asiaphotos-2015.zip' to bucket 'asiatrip'.
 
 $ mc ls play/asiatrip/
diff --git a/api/src/main/java/io/minio/BucketArgs.java b/api/src/main/java/io/minio/BucketArgs.java
index a7877eb10..c50bcdfda 100644
--- a/api/src/main/java/io/minio/BucketArgs.java
+++ b/api/src/main/java/io/minio/BucketArgs.java
@@ -39,9 +39,13 @@ public abstract static class Builder<B extends Builder<B, A>, A extends BucketAr
       extends BaseArgs.Builder<B, A> {
     private static final Pattern BUCKET_NAME_REGEX =
         Pattern.compile("^[a-z0-9][a-z0-9\\.\\-]{1,61}[a-z0-9]$");
+    protected boolean skipValidation = false;
 
     protected void validateBucketName(String name) {
       validateNotNull(name, "bucket name");
+      if (skipValidation) {
+        return;
+      }
 
       if (!BUCKET_NAME_REGEX.matcher(name).find()) {
         throw new IllegalArgumentException(
@@ -63,7 +67,7 @@ protected void validateBucketName(String name) {
     }
 
     private void validateRegion(String region) {
-      if (region != null && !HttpUtils.REGION_REGEX.matcher(region).find()) {
+      if (!skipValidation && region != null && !HttpUtils.REGION_REGEX.matcher(region).find()) {
         throw new IllegalArgumentException("invalid region " + region);
       }
     }
@@ -80,6 +84,12 @@ public B bucket(String name) {
       return (B) this;
     }
 
+    @SuppressWarnings("unchecked") // Its safe to type cast to B as B extends this class.
+    public B skipValidation(boolean skipValidation) {
+      this.skipValidation = skipValidation;
+      return (B) this;
+    }
+
     @SuppressWarnings("unchecked") // Its safe to type cast to B as B extends this class.
     public B region(String region) {
       validateRegion(region);
diff --git a/api/src/main/java/io/minio/ObjectArgs.java b/api/src/main/java/io/minio/ObjectArgs.java
index 60758c7ed..1d7759338 100644
--- a/api/src/main/java/io/minio/ObjectArgs.java
+++ b/api/src/main/java/io/minio/ObjectArgs.java
@@ -43,6 +43,9 @@ public abstract static class Builder<B extends Builder<B, A>, A extends ObjectAr
       extends BucketArgs.Builder<B, A> {
     protected void validateObjectName(String name) {
       validateNotEmptyString(name, "object name");
+      if (skipValidation) {
+        return;
+      }
       for (String token : name.split("/")) {
         if (token.equals(".") || token.equals("..")) {
           throw new IllegalArgumentException(
diff --git a/api/src/main/java/io/minio/Signer.java b/api/src/main/java/io/minio/Signer.java
index 4752a76d6..c45f11f1a 100644
--- a/api/src/main/java/io/minio/Signer.java
+++ b/api/src/main/java/io/minio/Signer.java
@@ -134,12 +134,14 @@ private void setCanonicalHeaders(Set<String> ignored_headers) {
         // https://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html
         // * Header having multiple values should be converted to comma separated values.
         // * Multi-spaced value of header should be trimmed to single spaced value.
+        // * Trim leading/trailing spaces in header value (As OkHttp trims leading/trailing spaces
+        // automatically, this is added for completion).
         this.canonicalHeaders.put(
             signedHeader,
             headers.values(name).stream()
                 .map(
                     value -> {
-                      return value.replaceAll("( +)", " ");
+                      return value.replaceAll("( +)", " ").trim();
                     })
                 .collect(Collectors.joining(",")));
       }
diff --git a/build.gradle b/build.gradle
index 2fcb7c066..7fdf71b21 100644
--- a/build.gradle
+++ b/build.gradle
@@ -34,7 +34,7 @@ apply plugin: "de.marcphilipp.nexus-publish"
 
 allprojects {
     group = 'io.minio'
-    version = '8.5.12'
+    version = '8.5.13'
     if (!project.hasProperty('release')) {
         version += '-DEV'
     }