diff --git a/src/curl_wrapper.cpp b/src/curl_wrapper.cpp
index c28ee7c..a981b83 100644
--- a/src/curl_wrapper.cpp
+++ b/src/curl_wrapper.cpp
@@ -77,7 +77,25 @@ CURLWrapper::~CURLWrapper() noexcept
     }
 }
 
-void CURLWrapper::set_useragent(string_view useragent)
+string CURLWrapper::escape_url(const string_view url) const
+{
+    char *cbuf{curl_easy_escape(_connection, url.data(),
+                                static_cast<int>(url.size()))};
+    string sbuf{cbuf};
+    curl_free(cbuf);
+    return sbuf;
+}
+
+string CURLWrapper::unescape_url(const string_view url) const
+{
+    char *cbuf{curl_easy_unescape(_connection, url.data(),
+                                  static_cast<int>(url.size()), nullptr)};
+    string sbuf{cbuf};
+    curl_free(cbuf);
+    return sbuf;
+}
+
+void CURLWrapper::set_useragent(const string_view useragent)
 {
     // NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
     check(curl_easy_setopt(_connection, CURLOPT_USERAGENT, useragent.data()));
diff --git a/src/curl_wrapper.hpp b/src/curl_wrapper.hpp
index 569da87..7dbc738 100644
--- a/src/curl_wrapper.hpp
+++ b/src/curl_wrapper.hpp
@@ -103,14 +103,7 @@ public:
      *
      *  @since  0.1.0
      */
-    [[nodiscard]] inline string escape_url(const string_view url) const
-    {
-        char *cbuf{curl_easy_escape(_connection, url.data(),
-                                    static_cast<int>(url.size()))};
-        string sbuf{cbuf};
-        curl_free(cbuf);
-        return sbuf;
-    }
+    [[nodiscard]] string escape_url(string_view url) const;
 
     /*!
      *  @brief  URL decodes the given string.
@@ -124,14 +117,7 @@ public:
      *
      *  @since  0.1.0
      */
-    [[nodiscard]] inline string unescape_url(const string_view url) const
-    {
-        char *cbuf{curl_easy_unescape(_connection, url.data(),
-                                      static_cast<int>(url.size()), nullptr)};
-        string sbuf{cbuf};
-        curl_free(cbuf);
-        return sbuf;
-    }
+    [[nodiscard]] string unescape_url(string_view url) const;
 
     /*!
      *  @brief  Set the User-Agent.
@@ -152,7 +138,7 @@ public:
      *
      *  @since  0.1.1
      */
-    inline void set_proxy(string_view proxy);
+    void set_proxy(string_view proxy);
 
     /*!
      *  @brief  Make a HTTP request.
@@ -169,7 +155,7 @@ public:
     [[nodiscard]] answer make_http_request(http_method method, string_view uri);
 
 private:
-    CURL *_connection;
+    CURL *_connection{};
     char _buffer_error[CURL_ERROR_SIZE]{};
     string _buffer_headers;
     string _buffer_body;