diff --git a/src/language_en.h b/src/language_en.h
index 5171bd0..f5b7c71 100644
--- a/src/language_en.h
+++ b/src/language_en.h
@@ -78,10 +78,16 @@ static languageDefinition language_en = { whichPluralForm_en, {
         "This option specifies what level of accessibility checking, if any, "
         "that Tidy should perform. "
         "<br/>"
-        "Level <var>0 (Tidy Classic)</var> is equivalent to Tidy Classic's accessibility "
-        "checking. "
+        "Level <var>0 (Tidy Classic)</var> performs no additional accessibility checking. "
         "<br/>"
-        "For more information on Tidy's accessibility checking, visit "
+        "Level <var>1 (Priority 1 Checks)</var> performs the Priority Level 1 checks."
+        "<br/>"
+        "Level <var>2 (Priority 2 Checks)</var> performs the Priority Level 1 and 2 checks."
+        "<br/>"
+        "Level <var>3 (Priority 3 Checks)</var> performs the Priority Level 1, 2, and 3 checks."
+        "<br/>"
+        "For more information on Tidy's accessibility checking, including the specific "
+        "checks that are made for each Priority Level, please visit "
         "<a href=\"http://www.html-tidy.org/accessibility/\"> Tidy's Accessibility Page</a>. "
     },
     {/* Important notes for translators:
diff --git a/version.txt b/version.txt
index 570e263..acb77d4 100644
--- a/version.txt
+++ b/version.txt
@@ -1,2 +1,2 @@
-5.7.54
-2021.07.31
+5.7.55
+2021.07.09