diff --git a/Gemfile.lock b/Gemfile.lock
index 9f65db4..452f599 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    json_schemer (0.2.18)
+    json_schemer (0.2.19)
       ecma-re-validator (~> 0.3)
       hana (~> 1.3)
       regexp_parser (~> 2.0)
@@ -10,12 +10,12 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    ecma-re-validator (0.3.0)
-      regexp_parser (~> 2.0)
+    ecma-re-validator (0.4.0)
+      regexp_parser (~> 2.2)
     hana (1.3.7)
     minitest (5.14.3)
     rake (13.0.1)
-    regexp_parser (2.1.1)
+    regexp_parser (2.2.1)
     uri_template (0.7.0)
 
 PLATFORMS
diff --git a/debian/changelog b/debian/changelog
index 155b857..910056e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+ruby-json-schemer (0.2.19-1) UNRELEASED; urgency=low
+
+  * New upstream release.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Wed, 09 Mar 2022 19:07:27 -0000
+
 ruby-json-schemer (0.2.18-2) unstable; urgency=medium
 
   * Reupload to unstable
diff --git a/lib/json_schemer.rb b/lib/json_schemer.rb
index 869a624..6945861 100644
--- a/lib/json_schemer.rb
+++ b/lib/json_schemer.rb
@@ -4,6 +4,7 @@ require 'ipaddr'
 require 'json'
 require 'net/http'
 require 'pathname'
+require 'set'
 require 'time'
 require 'uri'
 
diff --git a/lib/json_schemer/version.rb b/lib/json_schemer/version.rb
index 61adddd..1ff677f 100644
--- a/lib/json_schemer/version.rb
+++ b/lib/json_schemer/version.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module JSONSchemer
-  VERSION = '0.2.18'
+  VERSION = '0.2.19'
 end