diff --git a/composer.json b/composer.json
index 9cd1fc0..2d6e9e9 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "rosette/api",
-  "version": "1.30.0",
+  "version": "1.31.0",
   "description": "PHP Interface for Babel Street Text Analytics",
   "type": "library",
   "license": "Apache-2.0",
diff --git a/source/rosette/api/Api.php b/source/rosette/api/Api.php
index 9f26cac..6c9bef9 100644
--- a/source/rosette/api/Api.php
+++ b/source/rosette/api/Api.php
@@ -39,7 +39,7 @@ class Api
      *
      * @var string
      */
-    private static $binding_version = '1.30.0';
+    private static $binding_version = '1.31.0';
 
     /**
      * User key (required for Analytics API).