diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ae7a483..81ee731a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -190,7 +190,7 @@ Enhancements:
 Enhancements:
 
 * Add support for protocols and redir_protocols(
-  [libcurl SASL buffer overflow vulnerability](http://curl.haxx.se/docs/adv_20130206.html)).
+  [libcurl SASL buffer overflow vulnerability](https://curl.se/docs/adv_20130206.html)).
 * Add max_send_speed_large and max_recv_speed_large([Paul Schuegraf](https://github.com/pschuegr), [\#33](https://github.com/typhoeus/ethon/pull/33))
 
 ## 0.5.7
diff --git a/lib/ethon.rb b/lib/ethon.rb
index 461b4c36..77f888e6 100644
--- a/lib/ethon.rb
+++ b/lib/ethon.rb
@@ -31,6 +31,6 @@
 #
 # @note Please update to the latest libcurl version in order
 #   to benefit from all features and bugfixes.
-#   http://curl.haxx.se/download.html
+#   https://curl.se/download.html
 module Ethon
 end
diff --git a/lib/ethon/curls/codes.rb b/lib/ethon/curls/codes.rb
index 4b53096a..65d2f4ae 100644
--- a/lib/ethon/curls/codes.rb
+++ b/lib/ethon/curls/codes.rb
@@ -7,7 +7,7 @@ module Curls # :nodoc:
     module Codes
 
       # Libcurl error codes, refer
-      # https://github.com/bagder/curl/blob/master/include/curl/curl.h for details
+      # https://github.com/curl/curl/blob/master/include/curl/curl.h for details
       def easy_codes
         [
           :ok,
@@ -103,7 +103,7 @@ def easy_codes
       end
 
       # Curl-Multi socket error codes, refer
-      # https://github.com/bagder/curl/blob/master/include/curl/multi.h for details
+      # https://github.com/curl/curl/blob/master/include/curl/multi.h for details
       def multi_codes
         [
           :call_multi_perform, -1,
diff --git a/lib/ethon/curls/constants.rb b/lib/ethon/curls/constants.rb
index 3c7c32d9..06794147 100644
--- a/lib/ethon/curls/constants.rb
+++ b/lib/ethon/curls/constants.rb
@@ -24,18 +24,18 @@ module Curl
     MultiOption = enum(:multi_option, multi_options(:enum).to_a.flatten)
 
     # Used by curl_debug_callback when setting CURLOPT_DEBUGFUNCTION
-    # https://github.com/bagder/curl/blob/master/include/curl/curl.h#L378 for details
+    # https://github.com/curl/curl/blob/master/include/curl/curl.h#L378 for details
     DebugInfoType = enum(:debug_info_type, debug_info_types)
 
     # :nodoc:
     InfoType = enum(info_types.to_a.flatten)
 
     # Info details, refer
-    # https://github.com/bagder/curl/blob/master/src/tool_writeout.c#L66 for details
+    # https://github.com/curl/curl/blob/master/src/tool_writeout.c#L66 for details
     Info = enum(:info, infos.to_a.flatten)
 
     # Form options, used by FormAdd for temporary storage, refer
-    # https://github.com/bagder/curl/blob/master/lib/formdata.h#L51 for details
+    # https://github.com/curl/curl/blob/master/lib/formdata.h#L51 for details
     FormOption = enum(:form_option, form_options)
 
     # :nodoc:
diff --git a/lib/ethon/curls/form_options.rb b/lib/ethon/curls/form_options.rb
index ce5f0793..a43ec8d2 100644
--- a/lib/ethon/curls/form_options.rb
+++ b/lib/ethon/curls/form_options.rb
@@ -6,7 +6,7 @@ module Curls
     module FormOptions
 
       # Form options, used by FormAdd for temporary storage, refer
-      # https://github.com/bagder/curl/blob/master/lib/formdata.h#L51 for details
+      # https://github.com/curl/curl/blob/master/lib/formdata.h#L51 for details
       def form_options
         [
           :none,
diff --git a/lib/ethon/curls/infos.rb b/lib/ethon/curls/infos.rb
index d285f5b9..6c7583d7 100644
--- a/lib/ethon/curls/infos.rb
+++ b/lib/ethon/curls/infos.rb
@@ -21,8 +21,8 @@ def info_types
         }
       end
 
-      # http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTDEBUGFUNCTION
-      # https://github.com/bagder/curl/blob/master/include/curl/curl.h#L378
+      # https://curl.se/libcurl/c/CURLOPT_DEBUGFUNCTION.html
+      # https://github.com/curl/curl/blob/master/include/curl/curl.h#L378
       #
       # @example Return debug info types.
       #   Ethon::Curl.debug_info_types
@@ -41,7 +41,7 @@ def debug_info_types
       end
 
       # Return Info details, refer
-      # https://github.com/bagder/curl/blob/master/src/tool_writeout.c#L66 for details
+      # https://github.com/curl/curl/blob/master/src/tool_writeout.c#L66 for details
       #
       # @example Return infos.
       #   Ethon::Curl.infos
diff --git a/lib/ethon/curls/options.rb b/lib/ethon/curls/options.rb
index 0c391d44..7476466b 100644
--- a/lib/ethon/curls/options.rb
+++ b/lib/ethon/curls/options.rb
@@ -212,8 +212,8 @@ def self.option_type(type)
       end
 
       # Curl multi options, refer
-      # Defined @ https://github.com/bagder/curl/blob/master/include/curl/multi.h
-      # Documentation @ http://curl.haxx.se/libcurl/c/curl_multi_setopt.html
+      # Defined @ https://github.com/curl/curl/blob/master/include/curl/multi.h
+      # Documentation @ https://curl.se/libcurl/c/curl_multi_setopt.html
       option_type :multi
 
       option :multi, :socketfunction, :socket_callback, 1
@@ -231,8 +231,8 @@ def self.option_type(type)
       option :multi, :max_total_connections, :int, 3
 
       # Curl easy options
-      # Defined @ https://github.com/bagder/curl/blob/master/include/curl/curl.h
-      # Documentation @ http://curl.haxx.se/libcurl/c/curl_easy_setopt.html
+      # Defined @ https://github.com/curl/curl/blob/master/include/curl/curl.h
+      # Documentation @ https://curl.se/libcurl/c/curl_easy_setopt.html
       ## BEHAVIOR OPTIONS
       option_type :easy
 
diff --git a/lib/ethon/easy.rb b/lib/ethon/easy.rb
index 355a5194..7e1886fc 100644
--- a/lib/ethon/easy.rb
+++ b/lib/ethon/easy.rb
@@ -16,7 +16,7 @@
 module Ethon
 
   # This is the class representing the libcurl easy interface
-  # See http://curl.haxx.se/libcurl/c/libcurl-easy.html for more informations.
+  # See https://curl.se/libcurl/c/libcurl-easy.html for more informations.
   #
   # @example You can access the libcurl easy interface through this class, every request is based on it. The simplest setup looks like that:
   #
@@ -197,7 +197,7 @@ class Easy
     #   * :obsolete: These error codes will never be returned. They were used in an old
     #     libcurl version and are currently unused.
     #
-    # @see http://curl.haxx.se/libcurl/c/libcurl-errors.html
+    # @see https://curl.se/libcurl/c/libcurl-errors.html
     attr_accessor :return_code
 
     # Initialize a new Easy.
@@ -214,7 +214,7 @@ class Easy
     # @return [ Easy ] A new Easy.
     #
     # @see Ethon::Easy::Options
-    # @see http://curl.haxx.se/libcurl/c/curl_easy_setopt.html
+    # @see https://curl.se/libcurl/c/curl_easy_setopt.html
     def initialize(options = {})
       Curl.init
       set_attributes(options)
diff --git a/lib/ethon/easy/informations.rb b/lib/ethon/easy/informations.rb
index cac62a36..523cf006 100644
--- a/lib/ethon/easy/informations.rb
+++ b/lib/ethon/easy/informations.rb
@@ -3,7 +3,7 @@ module Ethon
   class Easy
 
     # This module contains the methods to return informations
-    # from the easy handle. See http://curl.haxx.se/libcurl/c/curl_easy_getinfo.html
+    # from the easy handle. See https://curl.se/libcurl/c/curl_easy_getinfo.html
     # for more information.
     module Informations