diff --git a/Gemfile.lock b/Gemfile.lock
index faa706b..92a2733 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,9 +22,9 @@ GEM
       i18n (>= 0.4.0)
       multi_json (~> 1.0.0)
     sinatra (1.3.1)
-      rack (>= 1.3.4, ~> 1.3)
-      rack-protection (>= 1.1.2, ~> 1.1)
-      tilt (>= 1.3.3, ~> 1.3)
+      rack (~> 1.3, >= 1.3.4)
+      rack-protection (~> 1.1, >= 1.1.2)
+      tilt (~> 1.3, >= 1.3.3)
     sinatra-contrib (1.3.1)
       backports (>= 2.0)
       eventmachine