diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4359044..1cf3300 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,14 @@
 Changelog for Custom Workflows
 ==============================
 
+2.0.1 *2022-05-13*
+------------------
+
+    Ruby 2.7 backward compatibility
+
+* Bug: #257 - IssueRelation.to_s is broken after #257 bug
+* Bug: #258 - Tried to create Proc object without a block 
+
 2.0.0 *2022-04-27*
 ------------------
 
diff --git a/README.md b/README.md
index 18d9fe3..4f08bec 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 Custom Workflows plug-in
 ========================
 
-The current version of Redmine CustomWorkflows is **2.0.0**
+The current version of Redmine CustomWorkflows is **2.0.1**
 
 [![pipeline status](https://gitlab.kontron.com/redmine-plugins/redmine_custom_workflows/badges/master/pipeline.svg)](https://gitlab.kontron.com/redmine-plugins/redmine_custom_workflows/-/commits/master)
 [![Support Ukraine Badge](https://bit.ly/support-ukraine-now)](https://github.com/support-ukraine/support-ukraine)
diff --git a/lib/redmine_custom_workflows/patches/issue_relation_patch.rb b/lib/redmine_custom_workflows/patches/issue_relation_patch.rb
index 1e67623..ecde0e2 100644
--- a/lib/redmine_custom_workflows/patches/issue_relation_patch.rb
+++ b/lib/redmine_custom_workflows/patches/issue_relation_patch.rb
@@ -36,7 +36,15 @@ module RedmineCustomWorkflows
           alias_method :old_to_s, :to_s
     
           def to_s(issue=nil)
-            block_given? ? old_to_s(issue, &Proc.new {}) : old_to_s(issue)
+            if block_given?
+              if Gem.ruby_version < Gem::Version.new('3.0')
+                old_to_s issue, &Proc.new
+              else
+                old_to_s issue, &Proc.new {}
+              end
+            else
+              old_to_s issue
+            end
           rescue NoMethodError => e
             if issue_from.present? || issue_to.present?
               raise e