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-rw-r--r--lib/axlsx/workbook/worksheet/conditional_formatting_rule.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/axlsx/workbook/worksheet/conditional_formatting_rule.rb b/lib/axlsx/workbook/worksheet/conditional_formatting_rule.rb
index 9db091be..916b31c2 100644
--- a/lib/axlsx/workbook/worksheet/conditional_formatting_rule.rb
+++ b/lib/axlsx/workbook/worksheet/conditional_formatting_rule.rb
@@ -182,7 +182,7 @@ module Axlsx
# @see timePeriod
def timePeriod=(v); Axlsx::validate_time_period_type(v); @timePeriod = v end
# @see formula
- def formula=(v); [*v].each {|x| Axlsx::validate_string(x) }; @formula = v end
+ def formula=(v); [*v].each {|x| Axlsx::validate_string(x) }; @formula = [*v].map { |form| ::CGI.escapeHTML(form) } end
# @see color_scale
def color_scale=(v)