diff --git a/Gemfile.lock b/Gemfile.lock
index 894e731..b0d6e24 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,13 +2,12 @@ PATH
   remote: .
   specs:
     resque-prioritize (0.1.0)
-      resque (~> 2.0.0)
+      resque (>= 2.0, < 2.7)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.0)
-    base64 (0.2.0)
     coderay (1.1.2)
     concurrent-ruby (1.2.2)
     diff-lcs (1.3)
@@ -21,7 +20,7 @@ GEM
     method_source (0.9.2)
     mono_logger (1.1.2)
     multi_json (1.15.0)
-    mustermann (3.0.0)
+    mustermann (2.0.2)
       ruby2_keywords (~> 0.0.1)
     parallel (1.19.1)
     parser (2.7.0.2)
@@ -30,21 +29,19 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     raabro (1.4.0)
-    rack (2.2.8)
-    rack-protection (3.2.0)
-      base64 (>= 0.1.0)
-      rack (~> 2.2, >= 2.2.4)
+    rack (2.2.9)
+    rack-protection (2.2.4)
+      rack
     rainbow (3.0.0)
     rake (13.0.1)
-    redis (4.1.3)
-    redis-namespace (1.7.0)
+    redis (4.4.0)
+    redis-namespace (1.6.0)
       redis (>= 3.0.4)
-    resque (2.0.0)
+    resque (2.6.0)
       mono_logger (~> 1.0)
       multi_json (~> 1.0)
       redis-namespace (~> 1.6)
       sinatra (>= 0.9.2)
-      vegas (~> 0.1.2)
     resque-scheduler (4.4.0)
       mono_logger (~> 1.0)
       redis (>= 3.3)
@@ -81,17 +78,15 @@ GEM
       fugit (~> 1.1, >= 1.1.6)
     saharspec (0.0.10)
       ruby2_keywords
-    sinatra (3.2.0)
-      mustermann (~> 3.0)
-      rack (~> 2.2, >= 2.2.4)
-      rack-protection (= 3.2.0)
+    sinatra (2.2.4)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.4)
       tilt (~> 2.0)
     tilt (2.3.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unicode-display_width (1.6.1)
-    vegas (0.1.11)
-      rack (>= 1.0.0)
 
 PLATFORMS
   ruby
diff --git a/resque-prioritize.gemspec b/resque-prioritize.gemspec
index c0c59a2..e96b514 100644
--- a/resque-prioritize.gemspec
+++ b/resque-prioritize.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   # The supported resque version is 2.0, though it needs to be urgently updated due to security reasons.
-  spec.add_dependency 'resque', '~> 2.0.0'
+  spec.add_dependency 'resque', '>= 2.0', '< 2.7'
 
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'rake', '~> 13.0.1'