diff --git a/classes/Config.php b/classes/Config.php
index d28a259c9..a1886e877 100644
--- a/classes/Config.php
+++ b/classes/Config.php
@@ -665,8 +665,8 @@ class Config {
 
 						<?php foreach ($errors as $error) { echo self::format_error($error); } ?>
 
-						<p>You might want to check tt-rss <a target="_blank" href="https://tt-rss.org/wiki.php">wiki</a> or the
-							<a target="_blank" href="https://community.tt-rss.org/">forums</a> for more information. Please search the forums before creating new topic
+						<p>You might want to check the tt-rss <a target="_blank" href="https://tt-rss.org/wiki/InstallationNotes/">wiki</a> or
+							<a target="_blank" href="https://community.tt-rss.org/">forums</a> for more information. Please search the forums before creating a new topic
 							for your question.</p>
 					</div>
 				</body>
@@ -681,8 +681,8 @@ class Config {
 				echo " * " . strip_tags($error)."\n";
 			}
 
-			echo "\nYou might want to check tt-rss wiki or the forums for more information.\n";
-			echo "Please search the forums before creating new topic for your question.\n";
+			echo "\nYou might want to check the tt-rss wiki or forums for more information.\n";
+			echo "Please search the forums before creating a new topic for your question.\n";
 
 			exit(1);
 		}
diff --git a/classes/Pref_Prefs.php b/classes/Pref_Prefs.php
index 2bd9ae0bd..dd28bd3f2 100644
--- a/classes/Pref_Prefs.php
+++ b/classes/Pref_Prefs.php
@@ -655,7 +655,7 @@ class Pref_Prefs extends Handler_Protected {
 						<?= \Controls\button_tag(\Controls\icon("palette") . " " . __("Customize"), "",
 								["onclick" => "Helpers.Prefs.customizeCSS()"]) ?>
 						<?= \Controls\button_tag(\Controls\icon("open_in_new") . " " . __("More themes..."), "",
-								["class" => "alt-info", "onclick" => "window.open(\"https://tt-rss.org/wiki/Themes\")"]) ?>
+								["class" => "alt-info", "onclick" => "window.open(\"https://tt-rss.org/Themes/\")"]) ?>
 
 						<?php
 
@@ -898,7 +898,7 @@ class Pref_Prefs extends Handler_Protected {
 				</div>
 				<div dojoType="dijit.layout.ContentPane" region="bottom">
 
-					<button dojoType='dijit.form.Button' class="alt-info pull-right" onclick='window.open("https://tt-rss.org/wiki/Plugins")'>
+					<button dojoType='dijit.form.Button' class="alt-info pull-right" onclick='window.open("https://tt-rss.org/Plugins/")'>
 						<i class='material-icons'>help</i>
 						<?= __("More info") ?>
 					</button>
diff --git a/include/functions.php b/include/functions.php
index 2d3dd6d1e..c32924743 100644
--- a/include/functions.php
+++ b/include/functions.php
@@ -352,7 +352,7 @@
 	}
 
 	/** Convert values accepted by tt-rss as true/false to PHP booleans
-	 * @see https://tt-rss.org/wiki/ApiReference#boolean-values
+	 * @see https://tt-rss.org/ApiReference/#boolean-values
 	 * @param null|string $s null values are considered false
 	 * @return bool
 	 */