diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0bc955e..fe449ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.7)
 project (mastodon-cpp
-         VERSION 0.17.1
+         VERSION 0.18.0
          LANGUAGES CXX
 )
 
diff --git a/src/mastodon-cpp.cpp b/src/mastodon-cpp.cpp
index d8c206a..804a4ca 100644
--- a/src/mastodon-cpp.cpp
+++ b/src/mastodon-cpp.cpp
@@ -143,6 +143,11 @@ const std::string API::urlencode(const std::string &str)
     return curlpp::escape(str);
 }
 
+const std::string API::urldecode(const std::string &str)
+{
+    return curlpp::unescape(str);
+}
+
 const uint_fast16_t API::register_app1(const string &instance,
                                        const string &client_name,
                                        const string &redirect_uri,
diff --git a/src/mastodon-cpp.hpp b/src/mastodon-cpp.hpp
index 2f9a134..023fede 100644
--- a/src/mastodon-cpp.hpp
+++ b/src/mastodon-cpp.hpp
@@ -335,6 +335,21 @@ public:
      */
     static const string urlencode(const string &str);
 
+    /*!
+     *  @brief  Decodes a percent-encoded string.
+     *
+     *          Calls curlpp::unescape(str)
+     *
+     *          See RFC 3986 section 2.1 for more info.
+     *
+     *  @param  str     The string
+     *
+     *  @return The decoded string
+     *
+     *  @since  0.18.0
+     */
+    static const string urldecode(const string &str);
+
     /*!
      *  @brief  Register application, step 1/2
      *