diff --git a/Gemfile.lock b/Gemfile.lock
index c6cb621..75bd92d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ PATH
     faker-bot (0.5.2)
       faker
       pastel (~> 0.7.2)
-      thor (~> 0.20.0)
+      thor (>= 0.20, < 1.1)
       tty-pager
       tty-screen
       tty-tree
@@ -113,14 +113,14 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
-    strings (0.1.6)
+    strings (0.1.8)
       strings-ansi (~> 0.1)
       unicode-display_width (~> 1.5)
       unicode_utils (~> 1.4)
-    strings-ansi (0.1.0)
+    strings-ansi (0.2.0)
     term-ansicolor (1.7.1)
       tins (~> 1.0)
-    thor (0.20.3)
+    thor (1.0.0)
     tins (1.21.1)
     tty-color (0.5.0)
     tty-pager (0.12.1)
diff --git a/faker-bot.gemspec b/faker-bot.gemspec
index d359c8d..9257776 100644
--- a/faker-bot.gemspec
+++ b/faker-bot.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "faker"
   spec.add_dependency "pastel", "~> 0.7.2"
-  spec.add_dependency "thor", "~> 0.20.0"
+  spec.add_dependency "thor", ">= 0.20", "< 1.1"
   spec.add_dependency "tty-pager"
   spec.add_dependency "tty-screen"
   spec.add_dependency "tty-tree"