diff --git a/Gemfile b/Gemfile
index 0a66e38e..ec2dad40 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 
 gem 'json_pure'
-gem 'cddl', '>=0.12.5'
+gem 'cddl', '>=0.12.6'
 gem 'cbor-diag', '>=0.8.7'