diff --git a/clients/go/zms/zms_schema.go b/clients/go/zms/zms_schema.go
index 26fdf544434..53a39eadc2d 100644
--- a/clients/go/zms/zms_schema.go
+++ b/clients/go/zms/zms_schema.go
@@ -111,12 +111,12 @@ func init() {
 
 	tTagValue := rdl.NewStringTypeBuilder("TagValue")
 	tTagValue.Comment("TagValue to contain generic string patterns")
-	tTagValue.Pattern("[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*")
+	tTagValue.Pattern("[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*")
 	sb.AddType(tTagValue.Build())
 
 	tTagCompoundValue := rdl.NewStringTypeBuilder("TagCompoundValue")
 	tTagCompoundValue.Comment("A compound value of TagValue")
-	tTagCompoundValue.Pattern("([a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*\\.)*[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*")
+	tTagCompoundValue.Pattern("([a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*\\.)*[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*")
 	sb.AddType(tTagCompoundValue.Build())
 
 	tTagValueList := rdl.NewStructTypeBuilder("Struct", "TagValueList")
diff --git a/core/zms/src/main/java/com/yahoo/athenz/zms/ZMSSchema.java b/core/zms/src/main/java/com/yahoo/athenz/zms/ZMSSchema.java
index 0290a7dbb72..a9931d412d7 100644
--- a/core/zms/src/main/java/com/yahoo/athenz/zms/ZMSSchema.java
+++ b/core/zms/src/main/java/com/yahoo/athenz/zms/ZMSSchema.java
@@ -94,11 +94,11 @@ private static Schema build() {
 
         sb.stringType("TagValue")
             .comment("TagValue to contain generic string patterns")
-            .pattern("[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*");
+            .pattern("[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*");
 
         sb.stringType("TagCompoundValue")
             .comment("A compound value of TagValue")
-            .pattern("([a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*\\.)*[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*");
+            .pattern("([a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*\\.)*[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*");
 
         sb.structType("TagValueList")
             .arrayField("list", "TagCompoundValue", false, "list of tag values");
diff --git a/core/zms/src/main/rdl/Names.tdl b/core/zms/src/main/rdl/Names.tdl
index df12a1164f0..70f81c7ab99 100644
--- a/core/zms/src/main/rdl/Names.tdl
+++ b/core/zms/src/main/rdl/Names.tdl
@@ -73,7 +73,7 @@ type AuthorityKeywords String (pattern="({AuthorityKeyword},)*{AuthorityKeyword}
 type TagKey String (pattern="({SimpleName}[:\\.])*{SimpleName}");
 
 //TagValue to contain generic string patterns
-type TagValue String (pattern="[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:,\\/-]*");
+type TagValue String (pattern="[a-zA-Z0-9_:,\\/][a-zA-Z0-9_:%,\\/-]*");
 
 //A compound value of TagValue
 type TagCompoundValue String (pattern="({TagValue}\\.)*{TagValue}");
diff --git a/core/zms/src/test/java/com/yahoo/athenz/zms/ZMSCoreTest.java b/core/zms/src/test/java/com/yahoo/athenz/zms/ZMSCoreTest.java
index e95443cfc94..57a9769bccb 100644
--- a/core/zms/src/test/java/com/yahoo/athenz/zms/ZMSCoreTest.java
+++ b/core/zms/src/test/java/com/yahoo/athenz/zms/ZMSCoreTest.java
@@ -2707,6 +2707,10 @@ public void testTagValueList() {
         tvl = new TagValueList().setList(Collections.singletonList("/homes/home/"));
         resultTvl = validator.validate(tvl, "TagValueList");
         assertTrue(resultTvl.valid);
+
+        tvl = new TagValueList().setList(Collections.singletonList("/home%test"));
+        resultTvl = validator.validate(tvl, "TagValueList");
+        assertTrue(resultTvl.valid);
     }
 
     private UserAuthorityAttributeMap getUserAuthorityAttributeMapForTest() {