diff --git a/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshDeploymentManifestSchema.java b/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshDeploymentManifestSchema.java
index 26d4364cb..3db01e150 100644
--- a/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshDeploymentManifestSchema.java
+++ b/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshDeploymentManifestSchema.java
@@ -104,9 +104,8 @@ public class BoshDeploymentManifestSchema implements YamlSchema {
 		YAtomicType t_ip_address = f.yatomic("IPAddress"); //TODO: some kind of checking?
 		t_ip_address.parseWith(ValueParsers.NE_STRING);
 		
-		YAtomicType t_url = f.yatomic("URL"); //TODO: some kind of checking?
-		t_url.parseWith(ValueParsers.NE_STRING);
-
+		YAtomicType t_url = f.yatomic("URL");
+		t_url.parseWith(BoshValueParsers.url("http", "https", "file"));
 
 		YAtomicType t_network_name = f.yatomic("NetworkName"); //TODO: resolve from 'cloud config' https://www.pivotaltracker.com/story/show/148712155
 		t_network_name.parseWith(ValueParsers.NE_STRING);
diff --git a/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshValueParsers.java b/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshValueParsers.java
index e3ba47b77..58eda3b46 100644
--- a/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshValueParsers.java
+++ b/headless-services/bosh-language-server/src/main/java/org/springframework/ide/vscode/bosh/BoshValueParsers.java
@@ -10,10 +10,44 @@
  *******************************************************************************/
 package org.springframework.ide.vscode.bosh;
 
+import java.net.URI;
+
 import org.springframework.ide.vscode.commons.util.ValueParseException;
 import org.springframework.ide.vscode.commons.util.ValueParser;
 
+import com.google.common.collect.ImmutableList;
+
 public class BoshValueParsers {
+	
+	public static ValueParser url(String... _schemes) {
+		return new ValueParser() {
+
+			private final ImmutableList<String> validSchemes = ImmutableList.copyOf(_schemes);
+
+			@Override
+			public Object parse(String s) throws Exception {
+				URI uri = new URI(s);
+				String scheme = uri.getScheme();
+				if (scheme==null) {
+					throw new ValueParseException(message());
+				} else if (!validSchemes.contains(scheme.toLowerCase())) {
+					int start = s.indexOf(scheme);
+					if (start>=0) {
+						int end = start + scheme.length();
+						throw new ValueParseException(message(), start, end);
+					} else {
+						// Trouble finding exact location of underlined region so underline whole url
+						throw new ValueParseException(message());
+					}
+				}
+				return uri;
+			}
+
+			private String message() {
+				return "Url scheme must be one of "+validSchemes;
+			}
+		};
+	}
 
 	public static final ValueParser INTEGER_OR_RANGE = new ValueParser() {
 
diff --git a/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshEditorTest.java b/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshEditorTest.java
index 18d363498..32ac05e00 100644
--- a/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshEditorTest.java
+++ b/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshEditorTest.java
@@ -232,22 +232,25 @@ public class BoshEditorTest {
 		);
 	}
 
-	@Test public void releasesBlockSha1RequiredForHttpUrl() throws Exception {
+	@Test public void releasesAdvancedValidations() throws Exception {
 		Editor editor = harness.newEditor(
 				"releases:\n" + 
 				"- name: some-release\n" +
 				"  url: https://my.releases.com/funky.tar.gz\n" +
 				"- name: other-relase\n" +
 				"  url: file:///root/releases/a-nice-file.tar.gz\n" +
+				"- name: bad-url\n" +
+				"  url: proto://something.com\n" +
 				"#x"
 		);
 		editor.assertProblems(
 				"url|'sha1' is required when the 'url' is http(s)",
+				"proto|Url scheme must be one of [http, https, file]",
 				"x|are required"
 		);
 	}
 
-	@Test public void releasesBlockReconcileAndHovers() throws Exception {
+	@Test public void releasesBlockPropertyReconcileAndHovers() throws Exception {
 		Editor editor = harness.newEditor(
 				"releases:\n" + 
 				"- name: some-release\n" +
@@ -407,10 +410,6 @@ public class BoshEditorTest {
 		editor.assertHoverContains("env", "Specifies advanced BOSH Agent configuration");
 	}
 	
-	@Test public void complexManifestValidation() throws Exception {
-		
-	}
-
 	@Test public void instanceGroups_job_hovers() throws Exception {
 		Editor editor = harness.newEditor(
 				"name: foo\n" + 
diff --git a/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshValueParserTest.java b/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshValueParserTest.java
index 604b1a82b..3c814eae9 100644
--- a/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshValueParserTest.java
+++ b/headless-services/bosh-language-server/src/test/java/org/springframework/ide/vscode/concourse/BoshValueParserTest.java
@@ -35,6 +35,23 @@ public class BoshValueParserTest {
 		assertProblem(BoshValueParsers.INTEGER_OR_RANGE, "<*>123-122<*>", "123 should be smaller than 122");
 	}
 
+	@Test public void urlOkay() throws Exception {
+		ValueParser urlParser = BoshValueParsers.url("http", "https", "file");
+		urlParser.parse("http://foobar.com/munhings.tar.gz");
+		urlParser.parse("https://foobar.com/munhings.tar.gz");
+		urlParser.parse("hTTp://foobar.com/munhings.tar.gz");
+		urlParser.parse("HTTPS://foobar.com/munhings.tar.gz");
+		urlParser.parse("file://local/file");
+		urlParser.parse("file:///local/file");
+		urlParser.parse("FILE:///local/file");
+	}
+
+	@Test public void urlGarbage() throws Exception {
+		ValueParser urlParser = BoshValueParsers.url("http", "https", "file");
+		assertProblem(urlParser, "<*>woot<*>://foobar.com", "Url scheme must be one of [http, https, file]");
+		assertProblem(urlParser, "<*>wOOt<*>://foobar.com", "Url scheme must be one of [http, https, file]");
+	}
+
 	private void assertProblem(ValueParser parser, String input, String expectedMessage) throws Exception {
 		String unmarkedInput = input.replace(MARKER, "");
 		int firstMarker = input.indexOf(MARKER);