diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c0ab66..6840371 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ CHANGELOG
 * Designed to make the most of DataSift's latest API version and features
 * Designed for Ruby 2.3+. Use features like keyword parameters across the board
 
+## v.3.7.2 (2016-11-08)
+### Fixes
+* Uses correct timestamp params in PYLON Sample API calls. `start_time` -> `start` and `end_time` - `end`
+
 ## v.3.7.1 (2016-10-06)
 ### Added
 * Explicit support for 500 and 502 responses from the API
@@ -33,6 +37,10 @@ CHANGELOG
 * Support for the [/pylon/update](http://dev.datasift.com/docs/platform/api/rest-api/endpoints/pylonupdate) API endpoint
 * Support for [API v1.3](http://dev.datasift.com/docs/platform/api/api-changelog)
 
+## v.3.5.2 (2016-11-08)
+### Fixes
+* Uses correct timestamp params in PYLON Sample API calls. `start_time` -> `start` and `end_time` - `end`
+
 ## v.3.5.1 (2016-10-06)
 ### Added
 * Explicit support for 500 and 502 responses from the API
diff --git a/VERSION b/VERSION
index a76ccff..0b2eb36 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.7.1
+3.7.2
diff --git a/lib/pylon.rb b/lib/pylon.rb
index b98bcf9..1b2d4d4 100644
--- a/lib/pylon.rb
+++ b/lib/pylon.rb
@@ -174,8 +174,8 @@ def sample(hash = '', count = nil, start_time = nil, end_time = nil, filter = ''
       params.merge!(hash: hash) unless hash.empty?
       params.merge!(id: id) unless id.empty?
       params.merge!(count: count) unless count.nil?
-      params.merge!(start_time: start_time) unless start_time.nil?
-      params.merge!(end_time: end_time) unless end_time.nil?
+      params.merge!(start: start_time) unless start_time.nil?
+      params.merge!(end: end_time) unless end_time.nil?
 
       if filter.empty?
         DataSift.request(:GET, 'pylon/sample', @config, params)