diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index aad85b7..e784d67 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -29,7 +29,7 @@ jobs:
                 coverage-extension: [pcov]
                 include:
                     #- { php-version: '5.3', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
-                    - { php-version: '5.4', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
+                    #- { php-version: '5.4', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
                     - { php-version: '5.5', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
                     - { php-version: '5.6', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
                     - { php-version: '7.1', experimental: false, os: ubuntu-latest, coverage-extension: 'xdebug' }
diff --git a/VERSION b/VERSION
index 771411b..8cc8fe0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.4.20
+1.4.21
diff --git a/resources/debian/control b/resources/debian/control
index ec4c4de..747b9af 100644
--- a/resources/debian/control
+++ b/resources/debian/control
@@ -10,6 +10,6 @@ Vcs-Git: https://github.com/~#VENDOR#~/~#PROJECT#~.git
 Package: ~#PKGNAME#~
 Provides: php-~#PROJECT#~
 Architecture: all
-Depends: php (>= 5.4.0), php-mbstring, php-tecnickcom-tc-lib-unicode-data (<< 2.0.0), php-tecnickcom-tc-lib-unicode-data (>= 1.7.20), ${misc:Depends}
+Depends: php (>= 5.4.0), php-mbstring, php-tecnickcom-tc-lib-unicode-data (<< 2.0.0), php-tecnickcom-tc-lib-unicode-data (>= 1.7.21), ${misc:Depends}
 Description: PHP Unicode methods.
  PHP library containing Unicode methods.
diff --git a/resources/rpm/rpm.spec b/resources/rpm/rpm.spec
index 5320737..6d55575 100644
--- a/resources/rpm/rpm.spec
+++ b/resources/rpm/rpm.spec
@@ -18,7 +18,7 @@ BuildArch: noarch
 
 Requires:  php(language) >= 5.4.0
 Requires:  php-composer(%{c_vendor}/tc-lib-unicode-data) < 2.0.0
-Requires:  php-composer(%{c_vendor}/tc-lib-unicode-data) >= 1.7.20
+Requires:  php-composer(%{c_vendor}/tc-lib-unicode-data) >= 1.7.21
 Requires:  php-pcre
 Requires:  php-mbstring