diff --git a/examples/filter/filter-safe.ecf b/examples/filter/filter-safe.ecf
index ade4f80f..75798ba3 100644
--- a/examples/filter/filter-safe.ecf
+++ b/examples/filter/filter-safe.ecf
@@ -12,22 +12,22 @@
 			<assertions precondition="true" postcondition="true" invariant="true" supplier_precondition="true"/>
 		</option>
 		<setting name="concurrency" value="thread"/>
-		<library name="base" location="$ISE_LIBRARY\library\base\base-safe.ecf"/>
-		<library name="connector_nino" location="..\..\library\server\ewsgi\connectors\nino\nino-safe.ecf" readonly="false">
+		<library name="base" location="$ISE_LIBRARY\library\base\base-safe.ecf" readonly="true"/>
+		<library name="connector_nino" location="..\..\library\server\ewsgi\connectors\nino\nino-safe.ecf" readonly="true">
 			<option debug="true">
 				<debug name="nino" enabled="true"/>
 			</option>
 		</library>
-		<library name="default_nino" location="..\..\library\server\wsf\default\nino-safe.ecf" readonly="false"/>
-		<library name="eel" location="..\..\contrib\ise_library\text\encryption\eel\eel-safe.ecf" readonly="false"/>
-		<library name="encoder" location="..\..\library\text\encoder\encoder-safe.ecf" readonly="false"/>
-		<library name="http" location="../../library/network/protocol/http/http-safe.ecf" readonly="false"/>
-		<library name="json" location="..\..\contrib\library\text\parser\json\library\json-safe.ecf" readonly="false"/>
-		<library name="uri_template" location="../../library/text/parser/uri_template/uri_template-safe.ecf" readonly="false"/>
-		<library name="wsf" location="..\..\library\server\wsf\wsf-safe.ecf" readonly="false"/>
-		<library name="wsf_extension" location="..\..\library\server\wsf\wsf_extension-safe.ecf" readonly="false"/>
-                <library name="http_authorization" location="..\..\library\server\authentication\http_authorization\http_authorization-safe.ecf" readonly="false"/>
-		<library name="time" location="$ISE_LIBRARY\library\time\time-safe.ecf"/>
+		<library name="default_nino" location="..\..\library\server\wsf\default\nino-safe.ecf" readonly="true"/>
+		<library name="eel" location="..\..\contrib\ise_library\text\encryption\eel\eel-safe.ecf" readonly="true"/>
+		<library name="encoder" location="..\..\library\text\encoder\encoder-safe.ecf" readonly="true"/>
+		<library name="http" location="../../library/network/protocol/http/http-safe.ecf" readonly="true"/>
+		<library name="json" location="..\..\contrib\library\text\parser\json\library\json-safe.ecf" readonly="true"/>
+		<library name="uri_template" location="../../library/text/parser/uri_template/uri_template-safe.ecf" readonly="true"/>
+		<library name="wsf" location="..\..\library\server\wsf\wsf-safe.ecf" readonly="true"/>
+		<library name="wsf_extension" location="..\..\library\server\wsf\wsf_extension-safe.ecf" readonly="true"/>
+                <library name="http_authorization" location="..\..\library\server\authentication\http_authorization\http_authorization-safe.ecf" readonly="true"/>
+		<library name="time" location="$ISE_LIBRARY\library\time\time-safe.ecf" readonly="true"/>
 		<cluster name="src" location="src\" recursive="true"/>
 	</target>
 </system>