diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6babdb..b8aabcb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,10 @@
 
 # SmarterCSV 1.x Change Log
 
-## 1.11.1 (2024-07-05)
+## 1.11.2 (2024-07-05)
+  * fixing missing errors definition
+    
+## 1.11.1 (2024-07-05) (YANKED)
   * improved behavior of Writer class
   * added SmarterCSV.generate shortcut for CSV writing
     
diff --git a/lib/smarter_csv/errors.rb b/lib/smarter_csv/errors.rb
new file mode 100644
index 0000000..ffe8d7d
--- /dev/null
+++ b/lib/smarter_csv/errors.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+module SmarterCSV
+  class Error < StandardError; end # new code should rescue this instead
+  # Reader:
+  class SmarterCSVException < Error; end # for backwards compatibility
+  class HeaderSizeMismatch < SmarterCSVException; end
+  class IncorrectOption < SmarterCSVException; end
+  class ValidationError < SmarterCSVException; end
+  class DuplicateHeaders < SmarterCSVException; end
+  class MissingKeys < SmarterCSVException; end # previously known as MissingHeaders
+  class NoColSepDetected < SmarterCSVException; end
+  class KeyMappingError < SmarterCSVException; end
+  # Writer:
+  class InvalidInputData < SmarterCSVException; end
+end
diff --git a/lib/smarter_csv/version.rb b/lib/smarter_csv/version.rb
index a1f5b30..bb6901d 100644
--- a/lib/smarter_csv/version.rb
+++ b/lib/smarter_csv/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module SmarterCSV
-  VERSION = "1.11.1"
+  VERSION = "1.11.2"
 end
diff --git a/smarter_csv.gemspec b/smarter_csv.gemspec
index d7f04ac..d0e45e0 100644
--- a/smarter_csv.gemspec
+++ b/smarter_csv.gemspec
@@ -10,7 +10,7 @@ Gem::Specification.new do |spec|
   spec.email         = ["tilo.sloboda@gmail.com"]
 
   spec.summary       = "CSV Reading and Writing"
-  spec.description   = "Ruby Gem for reading and writing: Smarter importing of CSV Files as Array(s) of Hashes, with lots of features for processing large files in parallel, embedded comments, unusual field- and record-separators, flexible mapping of CSV-headers to Hash-keys"
+  spec.description   = "Ruby Gem for convenient reading and writing: importing of CSV Files as Array(s) of Hashes, with lots of features for processing large files in parallel, embedded comments, unusual field- and record-separators, flexible mapping of CSV-headers to Hash-keys"
   spec.homepage      = "https://github.com/tilo/smarter_csv"
   spec.license       = 'MIT'