diff --git a/Gemfile b/Gemfile
index 6f20ff25a..b46741f4a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -96,6 +96,7 @@ gem 'webpacker', '~> 5.4'
 gem 'webpush', github: 'ClearlyClaire/webpush', ref: 'f14a4d52e201128b1b00245d11b6de80d6cfdcd9'
 gem 'webauthn', '~> 3.0'
 
+gem 'json-canonicalization', '~> 0.3.3'
 gem 'json-ld'
 gem 'json-ld-preloaded', '~> 3.2'
 gem 'rdf-normalize', '~> 0.5'