diff --git a/openid-connect-server/src/main/java/org/mitre/oauth2/service/impl/DefaultOAuth2ClientDetailsEntityService.java b/openid-connect-server/src/main/java/org/mitre/oauth2/service/impl/DefaultOAuth2ClientDetailsEntityService.java
index a8676d370..175c906fd 100644
--- a/openid-connect-server/src/main/java/org/mitre/oauth2/service/impl/DefaultOAuth2ClientDetailsEntityService.java
+++ b/openid-connect-server/src/main/java/org/mitre/oauth2/service/impl/DefaultOAuth2ClientDetailsEntityService.java
@@ -71,11 +71,13 @@ public class DefaultOAuth2ClientDetailsEntityService implements ClientDetailsEnt
 			throw new IllegalArgumentException("Tried to save a new client with an existing ID: " + client.getId());
 		}
 
-		for (String uri : client.getRegisteredRedirectUri()) {
-			if (blacklistedSiteService.isBlacklisted(uri)) {
-				throw new IllegalArgumentException("Client URI is blacklisted: " + uri);
-			}
-        }
+		if (client.getRegisteredRedirectUri() != null) {
+			for (String uri : client.getRegisteredRedirectUri()) {
+				if (blacklistedSiteService.isBlacklisted(uri)) {
+					throw new IllegalArgumentException("Client URI is blacklisted: " + uri);
+				}
+		    }
+		}
 		
 		// assign a random clientid if it's empty 
 		// NOTE: don't assign a random client secret without asking, since public clients have no secret
diff --git a/openid-connect-server/src/main/java/org/mitre/openid/connect/web/ClientDynamicRegistrationEndpoint.java b/openid-connect-server/src/main/java/org/mitre/openid/connect/web/ClientDynamicRegistrationEndpoint.java
index 09c59754f..1552b6ca7 100644
--- a/openid-connect-server/src/main/java/org/mitre/openid/connect/web/ClientDynamicRegistrationEndpoint.java
+++ b/openid-connect-server/src/main/java/org/mitre/openid/connect/web/ClientDynamicRegistrationEndpoint.java
@@ -168,32 +168,6 @@ public class ClientDynamicRegistrationEndpoint {
 			}
 		});
 	}
-
-
-	//TODO: this is a stub, make it work
-	@InitBinder({"require_auth_time"})
-	public void authTimeInitBinder(WebDataBinder binder) {
-		/*
-		 * Space-separated set of strings
-		 */
-		binder.registerCustomEditor(Boolean.class, new PropertyEditorSupport() {
-			@Override
-			public void setAsText(String text) throws IllegalArgumentException {
-				if (Strings.isNullOrEmpty(text)) {
-					setValue(false);
-				} else {
-					setValue(new Boolean(text));
-				}
-			}
-			
-			@Override
-			public String getAsText() {
-				Boolean bool = (Boolean) getValue();
-				return bool == null? "false" : bool.toString();
-			}
-		});
-		
-	}
 	
 	@RequestMapping(params = "type=client_associate", produces = "application/json")
 	public String clientAssociate(
@@ -225,7 +199,7 @@ public class ClientDynamicRegistrationEndpoint {
 			*/
 			
 			@RequestParam(value = "default_max_age", required = false) Integer defaultMaxAge,
-			@RequestParam(value = "require_auth_time", required = false) Boolean requireAuthTime,
+			@RequestParam(value = "require_auth_time", required = false, defaultValue = "true") Boolean requireAuthTime,
 			@RequestParam(value = "default_acr", required = false) String defaultAcr,
 			ModelMap model
 			) {