diff --git a/ballerina-to-openapi/src/main/java/io/ballerina/openapi/service/mapper/Constants.java b/ballerina-to-openapi/src/main/java/io/ballerina/openapi/service/mapper/Constants.java
index ff13e0ddd..ecea70098 100644
--- a/ballerina-to-openapi/src/main/java/io/ballerina/openapi/service/mapper/Constants.java
+++ b/ballerina-to-openapi/src/main/java/io/ballerina/openapi/service/mapper/Constants.java
@@ -327,7 +327,7 @@ public String toString() {
     public static final String SLASH = "/";
     public static final String HYPHEN = "-";
     public static final String CONTRACT = "contract";
-    public static final String VERSION = "'version";
+    public static final String VERSION = "version";
     public static final String TITLE = "title";
     public static final String OPENAPI_ANNOTATION = "openapi:ServiceInfo";
 
diff --git a/module-ballerina-openapi/annotation.bal b/module-ballerina-openapi/annotation.bal
index bc425e057..11f2c449d 100644
--- a/module-ballerina-openapi/annotation.bal
+++ b/module-ballerina-openapi/annotation.bal
@@ -33,7 +33,7 @@ public type ServiceInformation record {|
     boolean failOnErrors = true;
     boolean embed = false;
     string title?;
-    string 'version?;
+    string version?;
 |};
 
 // # Client configurations code.
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_1/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_1/service.bal
index 34b936283..a9fda2535 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_1/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_1/service.bal
@@ -2,7 +2,7 @@ import ballerina/http;
 import ballerina/openapi;
 
 @openapi:ServiceInfo {
-    'version: "2.0.0",
+    version: "2.0.0",
     title: "Mock Yaml"
 }
 service / on new http:Listener(9090) {
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_2/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_2/service.bal
index c1944bee2..1725aa18a 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_2/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_2/service.bal
@@ -3,7 +3,7 @@ import ballerina/openapi;
 
 @openapi:ServiceInfo {
     contract: "hello_openapi.yaml",
-    'version: "3.0.0"
+    version: "3.0.0"
 }
 service /greeting on new http:Listener(9090) {
     resource function get greeting() returns string {
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_5/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_5/service.bal
index 9d6c62cd4..88b0a31cd 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_5/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_5/service.bal
@@ -3,7 +3,7 @@ import ballerina/openapi;
 
 @openapi:ServiceInfo {
     contract: "hello_openapi.yaml",
-    'version: ""
+    version: ""
 }
 service /blankVersion on new http:Listener(9090) {
     resource function get greeting() returns string {
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_6/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_6/service.bal
index 60fb144ca..be23321b7 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_6/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_6/service.bal
@@ -2,7 +2,7 @@ import ballerina/http;
 import ballerina/openapi;
 
 @openapi:ServiceInfo {
-    'version: "",
+    version: "",
     title: ""
 }
 service /bothBlank on new http:Listener(9090) {
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_8/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_8/service.bal
index 1a95f04c1..f4fd340cb 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_8/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_8/service.bal
@@ -3,7 +3,7 @@ import ballerina/openapi;
 
 @openapi:ServiceInfo {
     contract: "hello_openapi.yaml",
-    'version: "",
+    version: "",
     title: ""
 }
 service /mTitle01 on new http:Listener(9090) {
diff --git a/openapi-integration-tests/src/test/resources/ballerina_sources/project_9/service.bal b/openapi-integration-tests/src/test/resources/ballerina_sources/project_9/service.bal
index 38b1e87d7..79569c1c8 100644
--- a/openapi-integration-tests/src/test/resources/ballerina_sources/project_9/service.bal
+++ b/openapi-integration-tests/src/test/resources/ballerina_sources/project_9/service.bal
@@ -2,7 +2,7 @@ import ballerina/http;
 import ballerina/openapi;
 
 @openapi:ServiceInfo {
-    'version: "4.0.0"
+    version: "4.0.0"
 }
 service /versionBase on new http:Listener(9090) {
     resource function get title() returns string {
diff --git a/openapi-integration-tests/src/test/resources/build/project_2/service.bal b/openapi-integration-tests/src/test/resources/build/project_2/service.bal
index c1944bee2..1725aa18a 100644
--- a/openapi-integration-tests/src/test/resources/build/project_2/service.bal
+++ b/openapi-integration-tests/src/test/resources/build/project_2/service.bal
@@ -3,7 +3,7 @@ import ballerina/openapi;
 
 @openapi:ServiceInfo {
     contract: "hello_openapi.yaml",
-    'version: "3.0.0"
+    version: "3.0.0"
 }
 service /greeting on new http:Listener(9090) {
     resource function get greeting() returns string {
diff --git a/openapi-integration-tests/src/test/resources/build/project_3/service.bal b/openapi-integration-tests/src/test/resources/build/project_3/service.bal
index 61c124c92..bc8f0720c 100644
--- a/openapi-integration-tests/src/test/resources/build/project_3/service.bal
+++ b/openapi-integration-tests/src/test/resources/build/project_3/service.bal
@@ -4,7 +4,7 @@ import ballerina/graphql;
 
 @openapi:ServiceInfo {
     contract: "hello_openapi.yaml",
-    'version: "3.0.0"
+    version: "3.0.0"
 }
 service /greeting on new http:Listener(9090) {
     resource function get greeting() returns string {