diff --git a/include/curl_wrapper.hpp b/include/curl_wrapper.hpp
index 118dfcb..cb5fc66 100644
--- a/include/curl_wrapper.hpp
+++ b/include/curl_wrapper.hpp
@@ -255,6 +255,14 @@ protected:
      */
     void set_access_token(const string_view access_token);
 
+
+    /*!
+     *  @brief  Set path to Certificate Authority (CA) bundle.
+     *
+     *  @since  0.2.1
+     */
+    void set_cainfo(string_view path);
+
 private:
     CURL *_connection;
     char _curl_buffer_error[CURL_ERROR_SIZE];
diff --git a/include/instance.hpp b/include/instance.hpp
index 527483f..0667a83 100644
--- a/include/instance.hpp
+++ b/include/instance.hpp
@@ -166,6 +166,32 @@ public:
      */
     vector<string> get_post_formats();
 
+    /*!
+     *  @brief  Set path to Certificate Authority (CA) bundle.
+     *
+     *  Sets also the CA info for all Connection%s that are initialized with
+     *  this Instance afterwards.
+     *
+     *  @since  0.2.1
+     */
+    void set_cainfo(string_view path)
+    {
+        _cainfo = path;
+        CURLWrapper::set_cainfo(path);
+    }
+
+    /*!
+     *  @brief  Returns the cainfo path that was previously set.
+     *
+     *  This is used when initializing a Connection.
+     *
+     *  @since  0.2.1
+     */
+    string_view get_cainfo()
+    {
+        return _cainfo;
+    }
+
 private:
     const string _hostname;
     const string _baseuri;
@@ -173,6 +199,7 @@ private:
     uint64_t _max_chars;
     string _proxy;
     vector<string> _post_formats;
+    string _cainfo;
 };
 
 } // namespace mastodonpp
diff --git a/src/connection.cpp b/src/connection.cpp
index 8512097..0eba695 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -35,6 +35,10 @@ Connection::Connection(Instance &instance)
     {
         CURLWrapper::set_access_token(_instance.get_access_token());
     }
+    if (!_instance.get_cainfo().empty())
+    {
+        CURLWrapper::set_cainfo(_instance.get_cainfo());
+    }
 }
 
 string Connection::endpoint_to_uri(const endpoint_variant &endpoint) const
diff --git a/src/curl_wrapper.cpp b/src/curl_wrapper.cpp
index d224ef5..4cfb9b5 100644
--- a/src/curl_wrapper.cpp
+++ b/src/curl_wrapper.cpp
@@ -223,6 +223,15 @@ void CURLWrapper::set_access_token(const string_view access_token)
     debuglog << "Set authorization token.\n";
 }
 
+void CURLWrapper::set_cainfo(string_view path)
+{
+    CURLcode code{curl_easy_setopt(_connection, CURLOPT_CAINFO, path.data())};
+    if (code != CURLE_OK)
+    {
+        throw CURLException{code, "Could not set CA info.", _curl_buffer_error};
+    }
+}
+
 size_t CURLWrapper::writer_body(char *data, size_t size, size_t nmemb)
 {
     if(data == nullptr)