diff --git a/Dockerfile b/Dockerfile
index 77316eb..ff85ddf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM ruby:3-alpine
 
-ARG CFNDSL_SPEC_VERSION=${CFNDSL_SPEC_VERSION:-149.0.0}
+ARG CFNDSL_SPEC_VERSION=${CFNDSL_SPEC_VERSION:-191.0.0}
 
 COPY . /src
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 059674d..dad30d4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,7 +25,7 @@ GEM
       aws-sigv4 (~> 1.4)
     aws-sigv4 (1.5.2)
       aws-eventstream (~> 1, >= 1.0.2)
-    cfndsl (1.6.0)
+    cfndsl (1.7.2)
       hana (~> 1.3)
     diff-lcs (1.5.0)
     duplicate (1.1.1)
diff --git a/lib/cfhighlander.compiler.rb b/lib/cfhighlander.compiler.rb
index 309bd7c..8c5c288 100644
--- a/lib/cfhighlander.compiler.rb
+++ b/lib/cfhighlander.compiler.rb
@@ -12,6 +12,7 @@
 require 'zip'
 require_relative './util/zip.util'
 require_relative './util/cloudformation.util'
+require 'ostruct'
 
 module Cfhighlander
 
diff --git a/lib/cfhighlander.version.rb b/lib/cfhighlander.version.rb
index a4d7558..c7cb980 100644
--- a/lib/cfhighlander.version.rb
+++ b/lib/cfhighlander.version.rb
@@ -1,3 +1,3 @@
 module Cfhighlander
-  VERSION="0.13.6".freeze
+  VERSION="0.13.7".freeze
 end