diff --git a/gradle/spring-module.gradle b/gradle/spring-module.gradle
index 09755cdac4a0..7d2f8c899453 100644
--- a/gradle/spring-module.gradle
+++ b/gradle/spring-module.gradle
@@ -115,6 +115,8 @@ publishing {
 	}
 }
 
+nullability { nullAwayVersion = "0.13.6" }
+
 // Disable publication of test fixture artifacts.
 components.java.withVariantsFromConfiguration(configurations.testFixturesApiElements) { skip() }
 components.java.withVariantsFromConfiguration(configurations.testFixturesRuntimeElements) { skip() }
diff --git a/spring-web/src/main/java/org/springframework/web/util/UriComponents.java b/spring-web/src/main/java/org/springframework/web/util/UriComponents.java
index 373215c584e7..732f26a79cf7 100644
--- a/spring-web/src/main/java/org/springframework/web/util/UriComponents.java
+++ b/spring-web/src/main/java/org/springframework/web/util/UriComponents.java
@@ -345,7 +345,7 @@ public MapTemplateVariables(Map<String, ? extends @Nullable Object> uriVariables
 	 */
 	private static class VarArgsTemplateVariables implements UriTemplateVariables {
 
-		private final Iterator<Object> valueIterator;
+		private final Iterator<@Nullable Object> valueIterator;
 
 		public VarArgsTemplateVariables(@Nullable Object... uriVariableValues) {
 			this.valueIterator = Arrays.asList(uriVariableValues).iterator();