diff --git a/src/main/webapp/WEB-INF/views/cfg/digestCfgForm.jsp b/src/main/webapp/WEB-INF/views/cfg/digestCfgForm.jsp
index 43490964a..133e4377e 100644
--- a/src/main/webapp/WEB-INF/views/cfg/digestCfgForm.jsp
+++ b/src/main/webapp/WEB-INF/views/cfg/digestCfgForm.jsp
@@ -49,7 +49,7 @@
 			<label class="control-label col-md-3"><font color="red">*</font>
 			<spring:message code="cfds_level" /></label>
 			<div class="col-md-6">
-				<input class="form-control required digits" type="text"
+				<input class="form-control required digits" range="[1,10]" type="text"
 					name="${cfgName}.cfdsLevel"
 					value="${digestCfg.cfdsLevel}">
 			</div>