diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 04b3d25..4dc3e92 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -27,6 +27,9 @@ jobs:
           - "5.30"
           - "5.28"
           - "5.26"
+          - "5.24"
+          - "5.22"
+          - "5.20"
 
     env:
       CIP_TAG: ${{ matrix.cip_tag }}
diff --git a/README.md b/README.md
index a0efd50..fc3bb9f 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,9 @@ US English language dictionary for Test::SpellCheck
 
 # DESCRIPTION
 
-This [Test::SpellCheck](https://metacpan.org/pod/Test::SpellCheck) provides the US English dictionary for checking 
-spelling.  It is a primary dictionary, so it shouldn't be used with other
-primary dictionaries.
+This [Test::SpellCheck](https://metacpan.org/pod/Test::SpellCheck) plugin provides the US English dictionary for
+checking spelling.  It is a primary dictionary, so it shouldn't be
+used with other primary dictionaries.
 
 # BUNDLED FILES
 
@@ -21,7 +21,7 @@ which is copyright under these terms (some of these terms are for other English
 language dictionaries from the SCOWL project, which are not bundled with this
 dist):
 
-COPYRIGHT, SOURCES, and CREDITS:
+## COPYRIGHT, SOURCES, and CREDITS:
 
 The English dictionaries come directly from SCOWL 
 and is thus under the same copyright of SCOWL.  The affix file is
diff --git a/lib/Test/SpellCheck/Plugin/Lang/EN/US.pm b/lib/Test/SpellCheck/Plugin/Lang/EN/US.pm
index 1e91e1b..75e8579 100644
--- a/lib/Test/SpellCheck/Plugin/Lang/EN/US.pm
+++ b/lib/Test/SpellCheck/Plugin/Lang/EN/US.pm
@@ -2,7 +2,7 @@ package Test::SpellCheck::Plugin::Lang::EN::US;
 
 use strict;
 use warnings;
-use 5.026;
+use 5.020;
 use experimental qw( signatures );
 use File::ShareDir::Dist qw( dist_share );
 use Path::Tiny qw( path );
@@ -16,9 +16,9 @@ use Path::Tiny qw( path );
 
 =head1 DESCRIPTION
 
-This L<Test::SpellCheck> provides the US English dictionary for checking 
-spelling.  It is a primary dictionary, so it shouldn't be used with other
-primary dictionaries.
+This L<Test::SpellCheck> plugin provides the US English dictionary for
+checking spelling.  It is a primary dictionary, so it shouldn't be
+used with other primary dictionaries.
 
 =cut
 
@@ -48,7 +48,7 @@ which is copyright under these terms (some of these terms are for other English
 language dictionaries from the SCOWL project, which are not bundled with this
 dist):
 
-COPYRIGHT, SOURCES, and CREDITS:
+=head2 COPYRIGHT, SOURCES, and CREDITS:
 
 The English dictionaries come directly from SCOWL 
 and is thus under the same copyright of SCOWL.  The affix file is
diff --git a/t/test_spellcheck_plugin_lang_en_us.t b/t/test_spellcheck_plugin_lang_en_us.t
index 04e51cc..0f772d1 100644
--- a/t/test_spellcheck_plugin_lang_en_us.t
+++ b/t/test_spellcheck_plugin_lang_en_us.t
@@ -1,4 +1,4 @@
-use 5.026;
+use 5.020;
 use Test2::V0 -no_srand => 1;
 use Test::SpellCheck::Plugin::Lang::EN::US;
 use Path::Tiny qw( path );