diff --git a/modules/spamfilter/schemas/spamfilter_denied_ip.xml b/modules/spamfilter/schemas/spamfilter_denied_ip.xml
index eba59c51d..4911300fb 100644
--- a/modules/spamfilter/schemas/spamfilter_denied_ip.xml
+++ b/modules/spamfilter/schemas/spamfilter_denied_ip.xml
@@ -1,5 +1,5 @@
 <table name="spamfilter_denied_ip">
-    <column name="ipaddress" type="varchar" size="250" notnull="notnull" primary_key="primary_key" />
-    <column name="description" type="varchar" size="250" />
+    <column name="ipaddress" type="varchar" size="60" utf8mb4="false" notnull="notnull" primary_key="primary_key" />
+    <column name="description" type="varchar" size="255" />
     <column name="regdate" type="date" index="idx_regdate" />
 </table>
diff --git a/modules/spamfilter/schemas/spamfilter_denied_word.xml b/modules/spamfilter/schemas/spamfilter_denied_word.xml
index 7ecb6a5be..ee6dab2d7 100644
--- a/modules/spamfilter/schemas/spamfilter_denied_word.xml
+++ b/modules/spamfilter/schemas/spamfilter_denied_word.xml
@@ -1,5 +1,5 @@
 <table name="spamfilter_denied_word">
-    <column name="word" type="varchar" size="250" notnull="notnull" primary_key="primary_key" />
+    <column name="word" type="varchar" size="250" utf8mb4="false" notnull="notnull" primary_key="primary_key" />
     <column name="hit" type="number" notnull="notnull" default="0" index="idx_hit" />
     <column name="latest_hit" type="date" index="idx_latest_hit" />
     <column name="regdate" type="date" index="idx_regdate" />