diff --git a/lib/bundler/vendor/uri/lib/uri/common.rb b/lib/bundler/vendor/uri/lib/uri/common.rb
index c7236fce98..7cf81d27f6 100644
--- a/lib/bundler/vendor/uri/lib/uri/common.rb
+++ b/lib/bundler/vendor/uri/lib/uri/common.rb
@@ -31,15 +31,10 @@ module Bundler::URI
     if Parser == RFC2396_Parser
       const_set("REGEXP", Bundler::URI::RFC2396_REGEXP)
       const_set("PATTERN", Bundler::URI::RFC2396_REGEXP::PATTERN)
-      Parser.new.pattern.each_pair do |sym, str|
-        unless REGEXP::PATTERN.const_defined?(sym)
-          REGEXP::PATTERN.const_set(sym, str)
-        end
-      end
     end
 
     Parser.new.regexp.each_pair do |sym, str|
-      remove_const(sym) if const_defined?(sym)
+      remove_const(sym) if const_defined?(sym, false)
       const_set(sym, str)
     end
   end
diff --git a/lib/bundler/vendor/uri/lib/uri/rfc2396_parser.rb b/lib/bundler/vendor/uri/lib/uri/rfc2396_parser.rb
index 0b7897d92a..c199f911c4 100644
--- a/lib/bundler/vendor/uri/lib/uri/rfc2396_parser.rb
+++ b/lib/bundler/vendor/uri/lib/uri/rfc2396_parser.rb
@@ -536,4 +536,11 @@ module Bundler::URI
     end
 
   end # class Parser
+
+  # Backward compatibility for Bundler::URI::REGEXP::PATTERN::*
+  RFC2396_Parser.new.pattern.each_pair do |sym, str|
+    unless RFC2396_REGEXP::PATTERN.const_defined?(sym, false)
+      RFC2396_REGEXP::PATTERN.const_set(sym, str)
+    end
+  end
 end # module Bundler::URI
diff --git a/lib/bundler/vendor/uri/lib/uri/rfc3986_parser.rb b/lib/bundler/vendor/uri/lib/uri/rfc3986_parser.rb
index 7473adcb68..d1ff28df23 100644
--- a/lib/bundler/vendor/uri/lib/uri/rfc3986_parser.rb
+++ b/lib/bundler/vendor/uri/lib/uri/rfc3986_parser.rb
@@ -142,25 +142,25 @@ module Bundler::URI
 
     # Compatibility for RFC2396 parser
     def extract(str, schemes = nil, &block) # :nodoc:
-      warn "Bundler::URI::RFC3986_PARSER.extract is obsoleted. Use Bundler::URI::RFC2396_PARSER.extract explicitly.", uplevel: 1 if $VERBOSE
+      warn "Bundler::URI::RFC3986_PARSER.extract is obsolete. Use Bundler::URI::RFC2396_PARSER.extract explicitly.", uplevel: 1 if $VERBOSE
       RFC2396_PARSER.extract(str, schemes, &block)
     end
 
     # Compatibility for RFC2396 parser
     def make_regexp(schemes = nil) # :nodoc:
-      warn "Bundler::URI::RFC3986_PARSER.make_regexp is obsoleted. Use Bundler::URI::RFC2396_PARSER.make_regexp explicitly.", uplevel: 1 if $VERBOSE
+      warn "Bundler::URI::RFC3986_PARSER.make_regexp is obsolete. Use Bundler::URI::RFC2396_PARSER.make_regexp explicitly.", uplevel: 1 if $VERBOSE
       RFC2396_PARSER.make_regexp(schemes)
     end
 
     # Compatibility for RFC2396 parser
     def escape(str, unsafe = nil) # :nodoc:
-      warn "Bundler::URI::RFC3986_PARSER.escape is obsoleted. Use Bundler::URI::RFC2396_PARSER.escape explicitly.", uplevel: 1 if $VERBOSE
+      warn "Bundler::URI::RFC3986_PARSER.escape is obsolete. Use Bundler::URI::RFC2396_PARSER.escape explicitly.", uplevel: 1 if $VERBOSE
       unsafe ? RFC2396_PARSER.escape(str, unsafe) : RFC2396_PARSER.escape(str)
     end
 
     # Compatibility for RFC2396 parser
     def unescape(str, escaped = nil) # :nodoc:
-      warn "Bundler::URI::RFC3986_PARSER.unescape is obsoleted. Use Bundler::URI::RFC2396_PARSER.unescape explicitly.", uplevel: 1 if $VERBOSE
+      warn "Bundler::URI::RFC3986_PARSER.unescape is obsolete. Use Bundler::URI::RFC2396_PARSER.unescape explicitly.", uplevel: 1 if $VERBOSE
       escaped ? RFC2396_PARSER.unescape(str, escaped) : RFC2396_PARSER.unescape(str)
     end
 
diff --git a/lib/bundler/vendor/uri/lib/uri/version.rb b/lib/bundler/vendor/uri/lib/uri/version.rb
index ce236bdb30..4f4207f3d0 100644
--- a/lib/bundler/vendor/uri/lib/uri/version.rb
+++ b/lib/bundler/vendor/uri/lib/uri/version.rb
@@ -1,6 +1,6 @@
 module Bundler::URI
   # :stopdoc:
-  VERSION_CODE = '010001'.freeze
+  VERSION_CODE = '010002'.freeze
   VERSION = VERSION_CODE.scan(/../).collect{|n| n.to_i}.join('.').freeze
   # :startdoc:
 end
diff --git a/lib/rubygems/vendor/uri/lib/uri/common.rb b/lib/rubygems/vendor/uri/lib/uri/common.rb
index 37c5c80270..4d2f78db84 100644
--- a/lib/rubygems/vendor/uri/lib/uri/common.rb
+++ b/lib/rubygems/vendor/uri/lib/uri/common.rb
@@ -31,15 +31,10 @@ module Gem::URI
     if Parser == RFC2396_Parser
       const_set("REGEXP", Gem::URI::RFC2396_REGEXP)
       const_set("PATTERN", Gem::URI::RFC2396_REGEXP::PATTERN)
-      Parser.new.pattern.each_pair do |sym, str|
-        unless REGEXP::PATTERN.const_defined?(sym)
-          REGEXP::PATTERN.const_set(sym, str)
-        end
-      end
     end
 
     Parser.new.regexp.each_pair do |sym, str|
-      remove_const(sym) if const_defined?(sym)
+      remove_const(sym) if const_defined?(sym, false)
       const_set(sym, str)
     end
   end
diff --git a/lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb b/lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb
index d222bdc438..a9b326e6b0 100644
--- a/lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb
+++ b/lib/rubygems/vendor/uri/lib/uri/rfc2396_parser.rb
@@ -536,4 +536,11 @@ module Gem::URI
     end
 
   end # class Parser
+
+  # Backward compatibility for Gem::URI::REGEXP::PATTERN::*
+  RFC2396_Parser.new.pattern.each_pair do |sym, str|
+    unless RFC2396_REGEXP::PATTERN.const_defined?(sym, false)
+      RFC2396_REGEXP::PATTERN.const_set(sym, str)
+    end
+  end
 end # module Gem::URI
diff --git a/lib/rubygems/vendor/uri/lib/uri/rfc3986_parser.rb b/lib/rubygems/vendor/uri/lib/uri/rfc3986_parser.rb
index 53dec866c2..3b6961abf6 100644
--- a/lib/rubygems/vendor/uri/lib/uri/rfc3986_parser.rb
+++ b/lib/rubygems/vendor/uri/lib/uri/rfc3986_parser.rb
@@ -142,25 +142,25 @@ module Gem::URI
 
     # Compatibility for RFC2396 parser
     def extract(str, schemes = nil, &block) # :nodoc:
-      warn "Gem::URI::RFC3986_PARSER.extract is obsoleted. Use Gem::URI::RFC2396_PARSER.extract explicitly.", uplevel: 1 if $VERBOSE
+      warn "Gem::URI::RFC3986_PARSER.extract is obsolete. Use Gem::URI::RFC2396_PARSER.extract explicitly.", uplevel: 1 if $VERBOSE
       RFC2396_PARSER.extract(str, schemes, &block)
     end
 
     # Compatibility for RFC2396 parser
     def make_regexp(schemes = nil) # :nodoc:
-      warn "Gem::URI::RFC3986_PARSER.make_regexp is obsoleted. Use Gem::URI::RFC2396_PARSER.make_regexp explicitly.", uplevel: 1 if $VERBOSE
+      warn "Gem::URI::RFC3986_PARSER.make_regexp is obsolete. Use Gem::URI::RFC2396_PARSER.make_regexp explicitly.", uplevel: 1 if $VERBOSE
       RFC2396_PARSER.make_regexp(schemes)
     end
 
     # Compatibility for RFC2396 parser
     def escape(str, unsafe = nil) # :nodoc:
-      warn "Gem::URI::RFC3986_PARSER.escape is obsoleted. Use Gem::URI::RFC2396_PARSER.escape explicitly.", uplevel: 1 if $VERBOSE
+      warn "Gem::URI::RFC3986_PARSER.escape is obsolete. Use Gem::URI::RFC2396_PARSER.escape explicitly.", uplevel: 1 if $VERBOSE
       unsafe ? RFC2396_PARSER.escape(str, unsafe) : RFC2396_PARSER.escape(str)
     end
 
     # Compatibility for RFC2396 parser
     def unescape(str, escaped = nil) # :nodoc:
-      warn "Gem::URI::RFC3986_PARSER.unescape is obsoleted. Use Gem::URI::RFC2396_PARSER.unescape explicitly.", uplevel: 1 if $VERBOSE
+      warn "Gem::URI::RFC3986_PARSER.unescape is obsolete. Use Gem::URI::RFC2396_PARSER.unescape explicitly.", uplevel: 1 if $VERBOSE
       escaped ? RFC2396_PARSER.unescape(str, escaped) : RFC2396_PARSER.unescape(str)
     end
 
diff --git a/lib/rubygems/vendor/uri/lib/uri/version.rb b/lib/rubygems/vendor/uri/lib/uri/version.rb
index ce9ab59580..72268badfd 100644
--- a/lib/rubygems/vendor/uri/lib/uri/version.rb
+++ b/lib/rubygems/vendor/uri/lib/uri/version.rb
@@ -1,6 +1,6 @@
 module Gem::URI
   # :stopdoc:
-  VERSION_CODE = '010001'.freeze
+  VERSION_CODE = '010002'.freeze
   VERSION = VERSION_CODE.scan(/../).collect{|n| n.to_i}.join('.').freeze
   # :startdoc:
 end
diff --git a/tool/bundler/vendor_gems.rb b/tool/bundler/vendor_gems.rb
index 1c5b1bc7cc..88cfdd2eb3 100644
--- a/tool/bundler/vendor_gems.rb
+++ b/tool/bundler/vendor_gems.rb
@@ -14,4 +14,4 @@ gem "securerandom", "0.4.0"
 gem "timeout", "0.4.2"
 gem "thor", "1.3.2"
 gem "tsort", "0.2.0"
-gem "uri", "1.0.1"
+gem "uri", "1.0.2"