diff --git a/Gemfile.lock b/Gemfile.lock
index b91edc1..2b84c55 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,17 +2,12 @@ PATH
   remote: .
   specs:
     git-shell (0.1.0)
-      config (>= 1.6.1, < 1.8.0)
+      config (>= 1.6.1, < 2.3.0)
       rest-client (~> 2.0.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.2)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
     ast (2.4.0)
     binding_of_caller (0.8.0)
       debug_inspector (>= 0.0.1)
@@ -22,60 +17,65 @@ GEM
       simplecov
       url
     coderay (1.1.2)
-    concurrent-ruby (1.1.4)
-    config (1.7.1)
-      activesupport (>= 3.0)
-      deep_merge (~> 1.2.1)
-      dry-validation (>= 0.12.2)
+    concurrent-ruby (1.1.5)
+    config (2.2.1)
+      deep_merge (~> 1.2, >= 1.2.1)
+      dry-validation (~> 1.0, >= 1.0.0)
     debug_inspector (0.0.3)
     deep_merge (1.2.1)
     diff-lcs (1.3)
     docile (1.3.1)
-    domain_name (0.5.20170404)
+    domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
-    dry-configurable (0.8.1)
+    dry-configurable (0.9.0)
       concurrent-ruby (~> 1.0)
       dry-core (~> 0.4, >= 0.4.7)
-    dry-container (0.7.0)
+    dry-container (0.7.2)
       concurrent-ruby (~> 1.0)
       dry-configurable (~> 0.1, >= 0.1.3)
-    dry-core (0.4.7)
+    dry-core (0.4.9)
+      concurrent-ruby (~> 1.0)
+    dry-equalizer (0.3.0)
+    dry-inflector (0.2.0)
+    dry-initializer (3.0.3)
+    dry-logic (1.0.5)
       concurrent-ruby (~> 1.0)
-    dry-equalizer (0.2.1)
-    dry-inflector (0.1.2)
-    dry-logic (0.5.0)
-      dry-container (~> 0.2, >= 0.2.6)
       dry-core (~> 0.2)
       dry-equalizer (~> 0.2)
-    dry-types (0.14.0)
+    dry-schema (1.4.3)
+      concurrent-ruby (~> 1.0)
+      dry-configurable (~> 0.8, >= 0.8.3)
+      dry-core (~> 0.4)
+      dry-equalizer (~> 0.2)
+      dry-initializer (~> 3.0)
+      dry-logic (~> 1.0)
+      dry-types (~> 1.2)
+    dry-types (1.2.2)
       concurrent-ruby (~> 1.0)
       dry-container (~> 0.3)
       dry-core (~> 0.4, >= 0.4.4)
-      dry-equalizer (~> 0.2)
+      dry-equalizer (~> 0.3)
       dry-inflector (~> 0.1, >= 0.1.2)
-      dry-logic (~> 0.5, >= 0.5)
-    dry-validation (0.13.0)
+      dry-logic (~> 1.0, >= 1.0.2)
+    dry-validation (1.4.1)
       concurrent-ruby (~> 1.0)
-      dry-configurable (~> 0.1, >= 0.1.3)
-      dry-core (~> 0.2, >= 0.2.1)
+      dry-container (~> 0.7, >= 0.7.1)
+      dry-core (~> 0.4)
       dry-equalizer (~> 0.2)
-      dry-logic (~> 0.5, >= 0.5.0)
-      dry-types (~> 0.14, >= 0.14)
+      dry-initializer (~> 3.0)
+      dry-schema (~> 1.0, >= 1.4.3)
     fuubar (2.3.2)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.5.3)
-      concurrent-ruby (~> 1.0)
     interception (0.5)
     jaro_winkler (1.5.2)
     json (2.1.0)
     method_source (0.9.2)
-    mime-types (3.1)
+    mime-types (3.3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    minitest (5.11.3)
+    mime-types-data (3.2019.1009)
     netrc (0.11.0)
     parallel (1.13.0)
     parser (2.6.0.0)
@@ -128,12 +128,9 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    thread_safe (0.3.6)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.5)
+    unf_ext (0.0.7.6)
     unicode-display_width (1.4.1)
     url (0.3.2)
 
diff --git a/git-shell.gemspec b/git-shell.gemspec
index ce8d29e..bddf74e 100644
--- a/git-shell.gemspec
+++ b/git-shell.gemspec
@@ -39,6 +39,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop', '~> 0.65.0'
   spec.add_development_dependency 'simplecov', '~> 0.16.1'
 
-  spec.add_dependency 'config', '>= 1.6.1', '< 1.8.0'
+  spec.add_dependency 'config', '>= 1.6.1', '< 2.3.0'
   spec.add_dependency 'rest-client', '~> 2.0.2'
 end