diff --git a/headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/metadata/ResourceHintProvider.java b/headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/metadata/ResourceHintProvider.java
index bf6db57a1..0c04ac5dd 100644
--- a/headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/metadata/ResourceHintProvider.java
+++ b/headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/metadata/ResourceHintProvider.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2016, 2019 Pivotal, Inc.
+ * Copyright (c) 2016, 2023 Pivotal, Inc.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -38,7 +38,8 @@ public class ResourceHintProvider implements ValueProviderStrategy {
 			"classpath*:",
 			"file:",
 			"http://",
-			"https://"
+			"https://",
+			"optional:"
 	};
 
 	@Override
diff --git a/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationPropertiesEditorTest.java b/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationPropertiesEditorTest.java
index 1a0f933e6..de0240c28 100644
--- a/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationPropertiesEditorTest.java
+++ b/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationPropertiesEditorTest.java
@@ -1655,7 +1655,8 @@ public class ApplicationPropertiesEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
     }
 
@@ -1740,7 +1741,8 @@ public class ApplicationPropertiesEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
     }
 
@@ -1769,7 +1771,8 @@ public class ApplicationPropertiesEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
 
         assertCompletionsDisplayString(
@@ -1839,7 +1842,8 @@ public class ApplicationPropertiesEditorTest extends AbstractPropsEditorTest {
                     "classpath*:",
                     "file:",
                     "http://",
-                    "https://"
+                    "https://",
+                    "optional:"
             );
 
             assertCompletionWithLabel(
diff --git a/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationYamlEditorTest.java b/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationYamlEditorTest.java
index 17ba5ccf5..b60d55acf 100644
--- a/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationYamlEditorTest.java
+++ b/headless-services/spring-boot-language-server/src/test/java/org/springframework/ide/vscode/boot/test/ApplicationYamlEditorTest.java
@@ -4357,7 +4357,8 @@ public class ApplicationYamlEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
 
         assertCompletionsDisplayString(
@@ -4370,7 +4371,8 @@ public class ApplicationYamlEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
 
     }
@@ -4760,7 +4762,8 @@ public class ApplicationYamlEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
     }
 
@@ -4782,7 +4785,8 @@ public class ApplicationYamlEditorTest extends AbstractPropsEditorTest {
                 "classpath*:",
                 "file:",
                 "http://",
-                "https://"
+                "https://",
+                "optional:"
         );
     }