diff --git a/kiss-tnc.gemspec b/kiss-tnc.gemspec
index f91442b1a6d1cbca9fb1e7d226e1c138659de9fc..45f692d719112d04d0cc871ad3ffdf175fe5e88e 100644
--- a/kiss-tnc.gemspec
+++ b/kiss-tnc.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
     spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
     spec.require_paths = ['lib']
 
-    spec.add_dependency 'abstractify', '~> 1.0'
+    spec.add_dependency 'abstractify', '~> 1.1'
     spec.add_dependency 'serialport', '~> 1.3'
     spec.add_development_dependency 'bundler', '~> 2.3'
     spec.add_development_dependency 'rake', '~> 13.0'