diff --git a/atst/filters.py b/atst/filters.py
index aade52c8..217b9e2f 100644
--- a/atst/filters.py
+++ b/atst/filters.py
@@ -77,10 +77,6 @@ def dateFromString(value, formatter="%m/%Y"):
     return datetime.datetime.strptime(value, formatter)
 
 
-def boolean(value):
-    return "true" if value else "false"
-
-
 def register_filters(app):
     app.jinja_env.filters["iconSvg"] = iconSvg
     app.jinja_env.filters["dollars"] = dollars
@@ -92,4 +88,3 @@ def register_filters(app):
     app.jinja_env.filters["renderList"] = renderList
     app.jinja_env.filters["formattedDate"] = formattedDate
     app.jinja_env.filters["dateFromString"] = dateFromString
-    app.jinja_env.filters["boolean"] = boolean