Use Encoding::UTF_8 constant :do_not_litter:

3 files changed, 3 insertions, 3 deletions

diff --git a/actionpack/lib/action_dispatch/http/parameters.rb b/actionpack/lib/action_dispatch/http/parameters.rb
index 25edd196c3..446862aad0 100644
--- a/actionpack/lib/action_dispatch/http/parameters.rb
+++ b/actionpack/lib/action_dispatch/http/parameters.rb
@@ -55,7 +55,7 @@ module ActionDispatch
       # should really prevent that from happening
       def encode_params(params)
         if params.is_a?(String)
-          return params.force_encoding("UTF-8").encode!
+          return params.force_encoding(Encoding::UTF_8).encode!
         elsif !params.is_a?(Hash)
           return params
         end
diff --git a/actionpack/lib/action_dispatch/http/upload.rb b/actionpack/lib/action_dispatch/http/upload.rb
index 8a97248eb3..67cb7fbcb5 100644
--- a/actionpack/lib/action_dispatch/http/upload.rb
+++ b/actionpack/lib/action_dispatch/http/upload.rb
@@ -70,7 +70,7 @@ module ActionDispatch
 
       def encode_filename(filename)
         # Encode the filename in the utf8 encoding, unless it is nil
-        filename.force_encoding("UTF-8").encode! if filename
+        filename.force_encoding(Encoding::UTF_8).encode! if filename
       end
     end
 
diff --git a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
index 7c12590c49..84df55fd5a 100644
--- a/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
+++ b/actionpack/lib/action_dispatch/middleware/session/abstract_store.rb
@@ -26,7 +26,7 @@ module ActionDispatch
 
       def generate_sid
         sid = SecureRandom.hex(16)
-        sid.encode!('UTF-8')
+        sid.encode!(Encoding::UTF_8)
         sid
       end