diff --git a/src/main/java/com/xmlcalabash/core/XProcRuntime.java b/src/main/java/com/xmlcalabash/core/XProcRuntime.java
index 065d921b..a7ce9f40 100644
--- a/src/main/java/com/xmlcalabash/core/XProcRuntime.java
+++ b/src/main/java/com/xmlcalabash/core/XProcRuntime.java
@@ -230,14 +230,14 @@ public XProcRuntime(XProcConfiguration config) {
 
         try {
             if (config.uriResolver != null) {
-                uriResolver.setUnderlyingURIResolver(Class.forName(config.uriResolver).asSubclass(URIResolver.class).newInstance());
+                uriResolver.setUnderlyingURIResolver(Class.forName(config.uriResolver).asSubclass(URIResolver.class).getDeclaredConstructor().newInstance());
             }
             if (config.entityResolver != null) {
-                uriResolver.setUnderlyingEntityResolver(Class.forName(config.entityResolver).asSubclass(EntityResolver.class).newInstance());
+                uriResolver.setUnderlyingEntityResolver(Class.forName(config.entityResolver).asSubclass(EntityResolver.class).getDeclaredConstructor().newInstance());
             }
 
             if (config.errorListener != null) {
-                msgListener = Class.forName(config.errorListener).asSubclass(XProcMessageListener.class).newInstance();
+                msgListener = Class.forName(config.errorListener).asSubclass(XProcMessageListener.class).getDeclaredConstructor().newInstance();
             } else {
                 msgListener = new DefaultXProcMessageListener();
             }
@@ -280,7 +280,7 @@ public XProcRuntime(XProcConfiguration config) {
                 Object def = null;
 
                 try {
-                    def = Class.forName(className).newInstance();
+                    def = Class.forName(className).getDeclaredConstructor().newInstance();
                 } catch (Throwable e) {
                     logger.trace("Attempting to instantiate " + className + " with processor context");
                     Class<?> cl = Class.forName(className);
diff --git a/src/main/java/com/xmlcalabash/extensions/CssFormatter.java b/src/main/java/com/xmlcalabash/extensions/CssFormatter.java
index 3a8f85d0..9e59ebf4 100644
--- a/src/main/java/com/xmlcalabash/extensions/CssFormatter.java
+++ b/src/main/java/com/xmlcalabash/extensions/CssFormatter.java
@@ -85,7 +85,7 @@ public void run() throws SaxonApiException {
 
         final CssProcessor provider;
         try {
-            provider = (CssProcessor) Class.forName(cssClass).newInstance();
+            provider = (CssProcessor) Class.forName(cssClass).getDeclaredConstructor().newInstance();
             provider.initialize(runtime,step,options);
         } catch (Exception e) {
             logger.debug(e.getMessage(), e);
diff --git a/src/main/java/com/xmlcalabash/library/ValidateWithSCH.java b/src/main/java/com/xmlcalabash/library/ValidateWithSCH.java
index 45002e4e..32727de4 100644
--- a/src/main/java/com/xmlcalabash/library/ValidateWithSCH.java
+++ b/src/main/java/com/xmlcalabash/library/ValidateWithSCH.java
@@ -10,6 +10,8 @@
 import com.xmlcalabash.runtime.XAtomicStep;
 import com.xmlcalabash.util.S9apiUtils;
 import net.sf.saxon.Configuration;
+import net.sf.saxon.lib.ResourceRequest;
+import net.sf.saxon.lib.ResourceResolver;
 import net.sf.saxon.om.NamespaceUri;
 import net.sf.saxon.om.StructuredQName;
 import net.sf.saxon.s9api.QName;
@@ -131,7 +133,7 @@ public void run() throws SaxonApiException {
 
         compiler = runtime.getProcessor().newXsltCompiler();
         compiler.setSchemaAware(schemaAware);
-        compiler.setURIResolver(new UResolver());
+        compiler.setResourceResolver(new UResolver());
         exec = compiler.compile(getSchematronXSLT("iso_svrl_for_xslt2.xsl"));
         XsltTransformer schemaCompiler = exec.load();
 
@@ -239,13 +241,13 @@ private boolean checkFailedAssert(XdmNode doc) {
         return results.size() != 0;
     }
 
-    private class UResolver implements URIResolver {
-
-        public Source resolve(String href, String base) throws TransformerException {
-            if ("iso_schematron_skeleton_for_saxon.xsl".equals(href)) {
+    private class UResolver implements ResourceResolver {
+        @Override
+        public Source resolve(ResourceRequest request) throws XPathException {
+            if ("iso_schematron_skeleton_for_saxon.xsl".equals(request.relativeUri)) {
                 return new SAXSource(new InputSource(skeleton));
             } else {
-                throw new XProcException(step.getNode(), "Failed to resolve " + href + " from JAR file.");
+                throw new XProcException(step.getNode(), "Failed to resolve " + request.uri + " from JAR file.");
             }
         }
     }
@@ -262,7 +264,7 @@ private SAXSource getSchematronXSLT(String xslt) {
     private XdmNode transform(XdmNode source, SAXSource stylesheet) throws SaxonApiException {
         XsltCompiler compiler = runtime.getProcessor().newXsltCompiler();
         compiler.setSchemaAware(schemaAware);
-        compiler.setURIResolver(new UResolver());
+        compiler.setResourceResolver(new UResolver());
         XsltExecutable exec = compiler.compile(stylesheet);
         XsltTransformer schemaCompiler = exec.load();
 
diff --git a/src/main/java/com/xmlcalabash/library/XSLFormatter.java b/src/main/java/com/xmlcalabash/library/XSLFormatter.java
index 51322a1c..34db1454 100644
--- a/src/main/java/com/xmlcalabash/library/XSLFormatter.java
+++ b/src/main/java/com/xmlcalabash/library/XSLFormatter.java
@@ -81,7 +81,7 @@ public void run() throws SaxonApiException {
         for (String className : foClasses) {
             if (provider == null) {
                 try {
-                    provider = (FoProcessor) Class.forName(className).newInstance();
+                    provider = (FoProcessor) Class.forName(className).getDeclaredConstructor().newInstance();
                     provider.initialize(runtime,step,options);
                     break;
                 } catch (NoClassDefFoundError ncdfe) {