diff --git a/spec/query_generator_spec.rb b/spec/query_generator_spec.rb
index 4226f20..1896e50 100644
--- a/spec/query_generator_spec.rb
+++ b/spec/query_generator_spec.rb
@@ -5,91 +5,91 @@ class SqlGeneratorTester
     it 'tests simple search term without column name and without quotes' do
       @query = TextToSqlQuery.new('-123', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.device_id LIKE ?', '%-123%']
+      expect(@query.where_clause).to eq ['players.device_id ILIKE ?', '%-123%']
     end
 
     it 'tests simple search term with column name and without quotes' do
       @query = TextToSqlQuery.new('title:ab', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.title LIKE ?', '%ab%']
+      expect(@query.where_clause).to eq ['players.title ILIKE ?', '%ab%']
     end
 
     it 'tests simple search term with unknown column name and without quotes' do
       @query = TextToSqlQuery.new('unknown:ab', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.device_id LIKE ?', '%ab%']
+      expect(@query.where_clause).to eq ['players.device_id ILIKE ?', '%ab%']
     end
 
     it 'tests simple search term without column name and with quotes' do
       @query = TextToSqlQuery.new('"ab"', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.device_id LIKE ?', '%"ab"%']
+      expect(@query.where_clause).to eq ['players.device_id ILIKE ?', '%"ab"%']
     end
 
     it 'tests simple search term with column name and with quotes' do
       @query = TextToSqlQuery.new('tag:"ab"', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.tag LIKE ?', '%"ab"%']
+      expect(@query.where_clause).to eq ['players.tag ILIKE ?', '%"ab"%']
     end
 
     it 'tests search without operators' do
       @query = TextToSqlQuery.new('123 456', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.device_id LIKE ? OR players.device_id LIKE ?)', '%123%', '%456%']
+      expect(@query.where_clause).to eq ['(players.device_id ILIKE ? OR players.device_id ILIKE ?)', '%123%', '%456%']
     end
 
     it 'tests search with OR operator' do
       @query = TextToSqlQuery.new('123 or 456', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.device_id LIKE ? OR players.device_id LIKE ?)', '%123%', '%456%']
+      expect(@query.where_clause).to eq ['(players.device_id ILIKE ? OR players.device_id ILIKE ?)', '%123%', '%456%']
     end
 
     it 'tests search with AND operator' do
       @query = TextToSqlQuery.new('123 and 456', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.device_id LIKE ? AND players.device_id LIKE ?)', '%123%', '%456%']
+      expect(@query.where_clause).to eq ['(players.device_id ILIKE ? AND players.device_id ILIKE ?)', '%123%', '%456%']
     end
 
     it 'tests search with NOT operator on default column' do
       @query = TextToSqlQuery.new('not 23', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['NOT players.device_id LIKE ?', '%23%']
+      expect(@query.where_clause).to eq ['NOT players.device_id ILIKE ?', '%23%']
     end
 
     it 'tests search with NOT operator on non-default column' do
       @query = TextToSqlQuery.new('not tag:23', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['NOT players.tag LIKE ?', '%23%']
+      expect(@query.where_clause).to eq ['NOT players.tag ILIKE ?', '%23%']
     end
 
     it 'tests search with mixed logical operators' do
       @query = TextToSqlQuery.new('title:ab and not tag:hf-1', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.title LIKE ? AND NOT players.tag LIKE ?)', '%ab%', '%hf-1%']
+      expect(@query.where_clause).to eq ['(players.title ILIKE ? AND NOT players.tag ILIKE ?)', '%ab%', '%hf-1%']
     end
 
     it 'tests search with mixed logical operators without NOT' do
       @query = TextToSqlQuery.new('title:a and title:b or title:c', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['((players.title LIKE ? AND players.title LIKE ?) OR players.title LIKE ?)', '%a%', '%b%', '%c%']
+      expect(@query.where_clause).to eq ['((players.title ILIKE ? AND players.title ILIKE ?) OR players.title ILIKE ?)', '%a%', '%b%', '%c%']
     end
 
     it 'tests search with brackets in expression' do
       @query = TextToSqlQuery.new('title:a and (title:b or title:c)', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.title LIKE ? AND (players.title LIKE ? OR players.title LIKE ?))', '%a%', '%b%', '%c%']
+      expect(@query.where_clause).to eq ['(players.title ILIKE ? AND (players.title ILIKE ? OR players.title ILIKE ?))', '%a%', '%b%', '%c%']
     end
 
     it 'tests search with brackets in expression and with NOT operator' do
       @query = TextToSqlQuery.new('title:a and not (title:b or title:c)', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['(players.title LIKE ? AND NOT (players.title LIKE ? OR players.title LIKE ?))', '%a%', '%b%', '%c%']
+      expect(@query.where_clause).to eq ['(players.title ILIKE ? AND NOT (players.title ILIKE ? OR players.title ILIKE ?))', '%a%', '%b%', '%c%']
     end
 
     it 'tests search with special characters in search term' do
       @query = TextToSqlQuery.new('title:"%a_\"', [:'players.title', :'players.tag', :'players.device_id'], :'players.device_id')
 
-      expect(@query.where_clause).to eq ['players.title LIKE ?', '%"\%a\_\\"%']
+      expect(@query.where_clause).to eq ['players.title ILIKE ?', '%"\%a\_\\"%']
     end
   end
 end
\ No newline at end of file
diff --git a/text_to_sql_query.rb b/text_to_sql_query.rb
index 241149a..12f5412 100644
--- a/text_to_sql_query.rb
+++ b/text_to_sql_query.rb
@@ -26,7 +26,7 @@ class TextToSqlQuery
     case first_key
     when :DEFAULT_COLUMN
       escaped_node_value = escape_special_chars node_value
-      ["#{@default_field.to_s} LIKE ?", "%#{escaped_node_value}%"]
+      ["#{@default_field.to_s} ILIKE ?", "%#{escaped_node_value}%"]
     when :OPERATOR_OR
       generate_expression_for_logical_operator(:OR, node_value)
     when :OPERATOR_AND
@@ -48,9 +48,9 @@ class TextToSqlQuery
       escaped_node_value = escape_special_chars node_value
       mapping = @fields_mappings[first_key.to_sym]
       if mapping.nil?
-        ["#{@default_field.to_s} LIKE ?", "%#{escaped_node_value}%"]
+        ["#{@default_field.to_s} ILIKE ?", "%#{escaped_node_value}%"]
       else
-        ["#{mapping.to_s} LIKE ?", "%#{escaped_node_value}%"]
+        ["#{mapping.to_s} ILIKE ?", "%#{escaped_node_value}%"]
       end
     end
   end