diff --git a/app/code/Magento/Cms/etc/di.xml b/app/code/Magento/Cms/etc/di.xml
index 61cf33f88abd6..e52c2ff99c712 100644
--- a/app/code/Magento/Cms/etc/di.xml
+++ b/app/code/Magento/Cms/etc/di.xml
@@ -287,6 +287,8 @@
- button
- i
- u
+ - br
+ - b
- class
diff --git a/app/etc/di.xml b/app/etc/di.xml
index d4651499e6fce..86054856fd2b0 100644
--- a/app/etc/di.xml
+++ b/app/etc/di.xml
@@ -1865,6 +1865,10 @@
- hr
- figure
- button
+ - i
+ - u
+ - br
+ - b
- class