diff --git a/core/pom.xml b/core/pom.xml
index 92c0c7ac..e4d21995 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/debug/server/pom.xml b/debug/server/pom.xml
index a36a533a..3a57a691 100644
--- a/debug/server/pom.xml
+++ b/debug/server/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/debug/service/pom.xml b/debug/service/pom.xml
index cfdfe579..5a4b775d 100644
--- a/debug/service/pom.xml
+++ b/debug/service/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/ls/server/pom.xml b/ls/server/pom.xml
index 63d4c58b..b3282ec1 100644
--- a/ls/server/pom.xml
+++ b/ls/server/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContribution.java b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContribution.java
index 73ceb49d..f682b816 100644
--- a/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContribution.java
+++ b/ls/server/src/main/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContribution.java
@@ -4,9 +4,11 @@
 import java.io.IOException;
 import java.net.URI;
 import java.util.Collections;
+import java.util.List;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import org.cqframework.cql.cql2elm.CqlCompiler;
+import org.cqframework.cql.elm.serializing.ElmJsonLibraryWriter;
 import org.cqframework.cql.elm.serializing.ElmXmlLibraryWriter;
 import org.eclipse.lsp4j.ExecuteCommandParams;
 import org.hl7.elm.r1.Library;
@@ -43,17 +45,37 @@ public CompletableFuture<Object> executeCommand(ExecuteCommandParams params) {
     // command
     // is XML and display it accordingly.
     private CompletableFuture<Object> viewElm(ExecuteCommandParams params) {
-        String uriString = ((JsonElement) params.getArguments().get(0)).getAsString();
-        try {
+        List<Object> args = params.getArguments();
+
+        // Defensive check: ensure we have at least the URI
+        if (args == null || args.isEmpty()) {
+            return CompletableFuture.completedFuture(null);
+        }
+
+        String uriString = ((JsonElement) args.get(0)).getAsString();
+
+        // Handle missing or null elmType by defaulting to "xml"
+        String elmType = "xml";
+        if (args.size() > 1 && args.get(1) != null) {
+            elmType = ((JsonElement) args.get(1)).getAsString();
+        }
 
+        try {
             URI uri = Uris.parseOrNull(uriString);
             CqlCompiler compiler = this.cqlCompilationManager.compile(uri);
+
             if (compiler != null) {
-                return CompletableFuture.completedFuture(convertToXml(compiler.getLibrary()));
+                // Use .equalsIgnoreCase for better robustness
+                if ("xml".equalsIgnoreCase(elmType)) {
+                    return CompletableFuture.completedFuture(convertToXml(compiler.getLibrary()));
+                } else {
+                    return CompletableFuture.completedFuture(convertToJson(compiler.getLibrary()));
+                }
             }
 
             return CompletableFuture.completedFuture(null);
         } catch (Exception e) {
+            // Log the error here if possible to avoid "silent" failures
             return CompletableFuture.completedFuture(null);
         }
     }
@@ -62,4 +84,9 @@ private static String convertToXml(Library library) throws IOException {
         ElmXmlLibraryWriter writer = new ElmXmlLibraryWriter();
         return writer.writeAsString(library);
     }
+
+    private static String convertToJson(Library library) throws IOException {
+        ElmJsonLibraryWriter writer = new ElmJsonLibraryWriter();
+        return writer.writeAsString(library);
+    }
 }
diff --git a/ls/server/src/test/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContributionTest.java b/ls/server/src/test/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContributionTest.java
index af10508a..71adf71b 100644
--- a/ls/server/src/test/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContributionTest.java
+++ b/ls/server/src/test/java/org/opencds/cqf/cql/ls/server/command/ViewElmCommandContributionTest.java
@@ -7,6 +7,8 @@
 import java.nio.file.Files;
 import java.nio.file.Paths;
 import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
 import org.eclipse.lsp4j.ExecuteCommandParams;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -19,6 +21,7 @@
 class ViewElmCommandContributionTest {
 
     private static ViewElmCommandContribution viewElmCommandContribution;
+    private Object expectedJson;
 
     @BeforeAll
     static void beforeAll() {
@@ -42,15 +45,71 @@ void executeCommand() {
         params.setCommand("org.opencds.cqf.cql.ls.viewElm");
         params.setArguments(Collections.singletonList(
                 JsonParser.parseString("\"\\/org\\/opencds\\/cqf\\/cql\\/ls\\/server\\/One.cql\"")));
-        viewElmCommandContribution.executeCommand(params).thenAccept(result -> {
-            try {
-                String expectedXml = new String(Files.readAllBytes(Paths.get("src/test/resources/One.xml")))
-                        .trim()
-                        .replaceAll("\\s+", "");
-                assertEquals(expectedXml, result.toString().trim().replaceAll("\\s+", ""));
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-        });
+        CompletableFuture<Void> future = viewElmCommandContribution
+                .executeCommand(params)
+                .thenAccept(result -> {
+                    try {
+                        String expectedXml = new String(Files.readAllBytes(
+                                        Paths.get("src/test/resources/org/opencds/cqf/cql/ls/server/One.xml")))
+                                .trim()
+                                .replaceAll("\\s+", "");
+                        assertEquals(expectedXml, result.toString().trim().replaceAll("\\s+", ""));
+                    } catch (IOException e) {
+                        throw new RuntimeException(e);
+                    }
+                });
+
+        // This ensures the test waits and fails if an exception occurs
+        future.join();
+    }
+
+    @Test
+    void executeCommandWithXmlElmType() {
+        ExecuteCommandParams params = new ExecuteCommandParams();
+        params.setCommand("org.opencds.cqf.cql.ls.viewElm");
+        params.setArguments(List.of(
+                JsonParser.parseString("\"\\/org\\/opencds\\/cqf\\/cql\\/ls\\/server\\/One.cql\""),
+                JsonParser.parseString("\"xml\"")));
+        CompletableFuture<Void> future = viewElmCommandContribution
+                .executeCommand(params)
+                .thenAccept(result -> {
+                    try {
+                        String expectedXml = new String(Files.readAllBytes(
+                                        Paths.get("src/test/resources/org/opencds/cqf/cql/ls/server/One.xml")))
+                                .trim()
+                                .replaceAll("\\s+", "");
+                        assertEquals(expectedXml, result.toString().trim().replaceAll("\\s+", ""));
+                    } catch (IOException e) {
+                        throw new RuntimeException(e);
+                    }
+                });
+
+        // This ensures the test waits and fails if an exception occurs
+        future.join();
+    }
+
+    @Test
+    void executeCommandWithJsonElmType() {
+        ExecuteCommandParams params = new ExecuteCommandParams();
+        params.setCommand("org.opencds.cqf.cql.ls.viewElm");
+        params.setArguments(List.of(
+                JsonParser.parseString("\"\\/org\\/opencds\\/cqf\\/cql\\/ls\\/server\\/One.cql\""),
+                JsonParser.parseString("\"json\"")));
+        CompletableFuture<Void> future = viewElmCommandContribution
+                .executeCommand(params)
+                .thenAccept(result -> {
+                    try {
+                        String expectedJson = new String(Files.readAllBytes(
+                                        Paths.get("src/test/resources/org/opencds/cqf/cql/ls/server/One.json")))
+                                .trim()
+                                .replaceAll("\\s+", "");
+                        assertEquals(expectedJson, result.toString().trim().replaceAll("\\s+", ""));
+                    } catch (IOException e) {
+                        throw new RuntimeException(e);
+                    }
+                });
+
+        // This ensures the test waits and fails if an exception occurs
+        future.join();
     }
 }
diff --git a/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.json b/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.json
new file mode 100644
index 00000000..03a39373
--- /dev/null
+++ b/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.json
@@ -0,0 +1,87 @@
+{
+  "library": {
+    "localId": "0",
+    "annotation": [
+      {
+        "type": "CqlToElmInfo",
+        "translatorVersion": "4.1.0",
+        "translatorOptions": "EnableAnnotations,EnableLocators,DisableListDemotion,DisableListPromotion,EnableResultTypes",
+        "signatureLevel": "All"
+      },
+      {
+        "type": "Annotation",
+        "t": [],
+        "s": {
+          "r": "208",
+          "s": [
+            {
+              "value": [
+                "",
+                "library One"
+              ]
+            }
+          ]
+        }
+      }
+    ],
+    "identifier": {
+      "id": "One"
+    },
+    "schemaIdentifier": {
+      "id": "urn:hl7-org:elm",
+      "version": "r1"
+    },
+    "usings": {
+      "def": [
+        {
+          "localId": "1",
+          "localIdentifier": "System",
+          "uri": "urn:hl7-org:elm-types:r1",
+          "annotation": []
+        }
+      ]
+    },
+    "statements": {
+      "def": [
+        {
+          "localId": "208",
+          "locator": "3:1-4:5",
+          "resultTypeName": "{urn:hl7-org:elm-types:r1}Integer",
+          "name": "One",
+          "context": "Unfiltered",
+          "accessLevel": "Public",
+          "annotation": [
+            {
+              "type": "Annotation",
+              "t": [],
+              "s": {
+                "r": "208",
+                "s": [
+                  {
+                    "r": "209",
+                    "value": [
+                      "",
+                      "define ",
+                      "\"One\"",
+                      ":\n    ",
+                      "1"
+                    ]
+                  }
+                ]
+              }
+            }
+          ],
+          "expression": {
+            "type": "Literal",
+            "localId": "209",
+            "locator": "4:5",
+            "resultTypeName": "{urn:hl7-org:elm-types:r1}Integer",
+            "valueType": "{urn:hl7-org:elm-types:r1}Integer",
+            "value": "1",
+            "annotation": []
+          }
+        }
+      ]
+    }
+  }
+}
\ No newline at end of file
diff --git a/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.xml b/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.xml
index c5fe2a4e..2ccd488a 100644
--- a/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.xml
+++ b/ls/server/src/test/resources/org/opencds/cqf/cql/ls/server/One.xml
@@ -1,25 +1,28 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<library xmlns="urn:hl7-org:elm:r1" xmlns:t="urn:hl7-org:elm-types:r1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:fhir="http://hl7.org/fhir" xmlns:qdm43="urn:healthit-gov:qdm:v4_3" xmlns:qdm53="urn:healthit-gov:qdm:v5_3" xmlns:a="urn:hl7-org:cql-annotations:r1">
-    <annotation translatorVersion="3.3.2" translatorOptions="EnableAnnotations,EnableLocators,DisableListDemotion,DisableListPromotion" signatureLevel="None" xsi:type="a:CqlToElmInfo"/>
+<library xmlns="urn:hl7-org:elm:r1"
+         xmlns:a="urn:hl7-org:cql-annotations:r1"
+         xmlns:t="urn:hl7-org:elm-types:r1"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" localId="0">
+    <annotation signatureLevel="All" translatorOptions="EnableAnnotations,EnableLocators,DisableListDemotion,DisableListPromotion,EnableResultTypes" translatorVersion="4.1.0" xsi:type="a:CqlToElmInfo"/>
     <annotation xsi:type="a:Annotation">
-        <a:s r="2">
+        <a:s r="208">
             <a:s>library One</a:s>
         </a:s>
     </annotation>
     <identifier id="One"/>
     <schemaIdentifier id="urn:hl7-org:elm" version="r1"/>
     <usings>
-        <def localIdentifier="System" uri="urn:hl7-org:elm-types:r1"/>
+        <def localId="1" localIdentifier="System" uri="urn:hl7-org:elm-types:r1"/>
     </usings>
     <statements>
-        <def localId="2" locator="3:1-4:5" name="One" context="Unfiltered" accessLevel="Public">
+        <def accessLevel="Public" context="Unfiltered" localId="208" locator="3:1-4:5" name="One" resultTypeName="t:Integer">
             <annotation xsi:type="a:Annotation">
-                <a:s r="2">
-                    <a:s r="1">define &quot;One&quot;:
+                <a:s r="208">
+                    <a:s r="209">define "One":
                         1</a:s>
                 </a:s>
             </annotation>
-            <expression localId="1" locator="4:5" valueType="t:Integer" value="1" xsi:type="Literal"/>
+            <expression localId="209" locator="4:5" resultTypeName="t:Integer" value="1" valueType="t:Integer" xsi:type="Literal"/>
         </def>
     </statements>
 </library>
\ No newline at end of file
diff --git a/ls/service/pom.xml b/ls/service/pom.xml
index 6b5134e8..55196c2b 100644
--- a/ls/service/pom.xml
+++ b/ls/service/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/plugin/debug/pom.xml b/plugin/debug/pom.xml
index fe54770c..a71a9a33 100644
--- a/plugin/debug/pom.xml
+++ b/plugin/debug/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.opencds.cqf.cql.ls</groupId>
         <artifactId>cql-ls</artifactId>
-        <version>4.1.2</version>
+        <version>4.1.2-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 28318d87..5fffd863 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <groupId>org.opencds.cqf.cql.ls</groupId>
     <artifactId>cql-ls</artifactId>
     <packaging>pom</packaging>
-    <version>4.1.2</version>
+    <version>4.1.2-SNAPSHOT</version>
 
     <name>CQL Language Server</name>
     <description>A Language Server for CQL implementing the LSP</description>