add depends on paperclip

Gemfile.lock

@@ -2,10 +2,34 @@ PATH
   remote: .
   specs:
     paperclip-qiniu (0.0.1)
+      paperclip
 
 GEM
   remote: https://rubygems.org/
   specs:
+    activemodel (3.2.6)
+      activesupport (= 3.2.6)
+      builder (~> 3.0.0)
+    activerecord (3.2.6)
+      activemodel (= 3.2.6)
+      activesupport (= 3.2.6)
+      arel (~> 3.0.2)
+      tzinfo (~> 0.3.29)
+    activesupport (3.2.6)
+      i18n (~> 0.6)
+      multi_json (~> 1.0)
+    arel (3.0.2)
+    builder (3.0.0)
+    cocaine (0.2.1)
+    i18n (0.6.0)
+    mime-types (1.19)
+    multi_json (1.3.6)
+    paperclip (2.7.0)
+      activerecord (>= 2.3.0)
+      activesupport (>= 2.3.2)
+      cocaine (>= 0.0.2)
+      mime-types
+    tzinfo (0.3.33)
 
 PLATFORMS
   ruby

paperclip-qiniu.gemspec

@@ -14,4 +14,5 @@ Gem::Specification.new do |gem|
   gem.name          = "paperclip-qiniu"
   gem.require_paths = ["lib"]
   gem.version       = Paperclip::Qiniu::VERSION
+  gem.add_dependency 'paperclip'
 end