diff --git a/.github/workflows/4_1_7.yml b/.github/workflows/5_0_5.yml
similarity index 98%
rename from .github/workflows/4_1_7.yml
rename to .github/workflows/5_0_5.yml
index 4ff512f..81da87c 100644
--- a/.github/workflows/4_1_7.yml
+++ b/.github/workflows/5_0_5.yml
@@ -1,8 +1,8 @@
-name: Tests 4.1.7
+name: Tests 5.0.5
 
 env:
   PLUGIN_NAME: redmine_datetime_custom_field
-  REDMINE_VERSION: 4.1.7
+  REDMINE_VERSION: 5.0.5
   RAILS_ENV: test
 
 on:
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: ['2.6']
+        ruby: ['2.7']
         db: ['postgres']
       fail-fast: false
 
diff --git a/README.md b/README.md
index 442065a..1601f1e 100644
--- a/README.md
+++ b/README.md
@@ -10,13 +10,13 @@ Note that this plugin has a dependency. You have to install this other plugin:
 
 ## Test status
 
-|Plugin branch| Redmine Version   | Test Status      |
-|-------------|-------------------|------------------|
-|master       | 4.2.10            | [![4.2.10][1]][5]|  
-|master       | 4.1.7             | [![4.1.7][2]][5] |
-|master       | master            | [![master][4]][5]|
+|Plugin branch| Redmine Version | Test Status       |
+|-------------|-----------------|-------------------|
+|master       | 4.2.10          | [![4.2.10][1]][5] |  
+|master       | 5.0.5           | [![5.0.5][2]][5]  |
+|master       | master          | [![master][4]][5] |
 
 [1]: https://github.com/nanego/redmine_datetime_custom_field/actions/workflows/4_2_10.yml/badge.svg
-[2]: https://github.com/nanego/redmine_datetime_custom_field/actions/workflows/4_1_7.yml/badge.svg
+[2]: https://github.com/nanego/redmine_datetime_custom_field/actions/workflows/5_0_5.yml/badge.svg
 [4]: https://github.com/nanego/redmine_datetime_custom_field/actions/workflows/master.yml/badge.svg
 [5]: https://github.com/nanego/redmine_datetime_custom_field/actions