diff --git a/CHANGELOG.md b/CHANGELOG.md
index a7b88f6..1edec0b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## [v1.3.2] - 2016-02-08
+- Fix worker environments running Puma servers. Remove underscore from header.
+ - Close [issue #15](https://github.com/tawan/active-elastic-job/issues/15)
 ## [v1.3.1] - 2016-02-07
 
 - Fix backwards incompatibility
diff --git a/Gemfile.lock b/Gemfile.lock
index a2f060c..22ce73e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    active_elastic_job (1.3.1)
+    active_elastic_job (1.3.2)
       aws-sdk (~> 2)
       rails (~> 4.2)
 
diff --git a/lib/active_elastic_job/version.rb b/lib/active_elastic_job/version.rb
index e6f3815..1fcbd60 100644
--- a/lib/active_elastic_job/version.rb
+++ b/lib/active_elastic_job/version.rb
@@ -2,7 +2,7 @@ module ActiveElasticJob
   module VERSION
     MAJOR = 1
     MINOR = 3
-    TINY  = 1
+    TINY  = 2
     PRE   = nil
 
     STRING = [MAJOR, MINOR, TINY, PRE].compact.join('.')
diff --git a/lib/active_job/queue_adapters/active_elastic_job_adapter.rb b/lib/active_job/queue_adapters/active_elastic_job_adapter.rb
index 3b8fd9d..e58b31e 100644
--- a/lib/active_job/queue_adapters/active_elastic_job_adapter.rb
+++ b/lib/active_job/queue_adapters/active_elastic_job_adapter.rb
@@ -103,7 +103,7 @@ def build_message(queue_name, serialized_job, timestamp)
             message_body: serialized_job,
             delay_seconds: calculate_delay(timestamp),
             message_attributes: {
-              message_digest: {
+              "message-digest".freeze => {
                 string_value: message_digest(serialized_job),
                 data_type: "String".freeze
               },