diff --git a/ebnf.gemspec b/ebnf.gemspec
index 930e201..7af2ad4 100755
--- a/ebnf.gemspec
+++ b/ebnf.gemspec
@@ -30,14 +30,14 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 3.0'
   gem.requirements          = []
-  gem.add_runtime_dependency     'sxp',             '~> 1.2'
+  gem.add_runtime_dependency     'sxp',             '~> 1.3'
   gem.add_runtime_dependency     'scanf',           '~> 1.0'
   gem.add_runtime_dependency     'rdf',             '~> 3.3' # Required by sxp
   gem.add_runtime_dependency     'htmlentities',    '~> 4.3'
   gem.add_runtime_dependency     'unicode-types',   '~> 1.8'
   gem.add_development_dependency 'amazing_print',   '~> 1.4'
-  gem.add_development_dependency 'rdf-spec',        '~> 3.2'
-  gem.add_development_dependency 'rdf-turtle',      '~> 3.2'
+  gem.add_development_dependency 'rdf-spec',        '~> 3.3'
+  gem.add_development_dependency 'rdf-turtle',      '~> 3.3'
   gem.add_development_dependency 'nokogiri',        '~> 1.15', '>= 1.15.4'
   gem.add_development_dependency 'erubis',          '~> 2.7'
   gem.add_development_dependency 'rspec',           '~> 3.12'