diff --git a/cms/djangoapps/contentstore/utils.py b/cms/djangoapps/contentstore/utils.py
index 5ec5d6c91798..abe4fc5ec3f1 100644
--- a/cms/djangoapps/contentstore/utils.py
+++ b/cms/djangoapps/contentstore/utils.py
@@ -734,6 +734,7 @@ def translation_language(language):
 
 
 def replace_script_tags(string):
-    string = string.replace('<script', '<div')
-    string = string.replace('</script>', '</div>')
-    return string
\ No newline at end of file
+    if type(string) == str:
+        string = string.replace('<script', '<div')
+        string = string.replace('</script>', '</div>')
+    return string