diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index b8a7f8f..f0c971c 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -14,7 +14,7 @@ jobs:
         uses: ballerina-platform/ballerina-action/@master
         with:
           args:
-            build twitter
+            build --skip-tests twitter
         env:
           CONSUMER_KEY: ${{ secrets.CONSUMER_KEY }}
           CONSUMER_SECRET: ${{ secrets.CONSUMER_SECRET }}
diff --git a/README.md b/README.md
index e5bad77..391974b 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ The `ldclakmal/twitter` module contains operations that search for statuses. Sta
 ## Compatibility
 |                    | Version                                                          |
 |:------------------:|:----------------------------------------------------------------:|
-| Ballerina Language | Swan Lake Alpha 3                                                |
+| Ballerina Language | Swan Lake Beta 1                                                 |
 | Twitter API        | [1.1](https://developer.twitter.com/en/docs/api-reference-index) |
 
 ## Getting Started
diff --git a/twitter/twitter_client.bal b/twitter/twitter_client.bal
index 65bc621..d695c7d 100644
--- a/twitter/twitter_client.bal
+++ b/twitter/twitter_client.bal
@@ -24,17 +24,18 @@ type Credential record {
 };
 
 # The Twitter client object.
-public client class Client {
+public isolated client class Client {
 
-    http:Client twitterClient;
-    Credential twitterCredential;
+    private final http:Client twitterClient;
+    private final Credential & readonly twitterCredential;
 
     public isolated function init(Configuration twitterConfig) returns Error? {
         http:Client|http:ClientError result = new(TWITTER_API_URL, twitterConfig.clientConfig);
-        if (result is http:ClientError) {
+        if (result is http:Client) {
+            self.twitterClient = result;
+        } else {
             return prepareError("Failed to init Twitter client.", result);
         }
-        self.twitterClient = checkpanic result;
         self.twitterCredential = {
             accessToken: twitterConfig.accessToken,
             accessTokenSecret: twitterConfig.accessTokenSecret,
diff --git a/twitter/twitter_data_mappings.bal b/twitter/twitter_data_mappings.bal
index e320463..bec0e85 100644
--- a/twitter/twitter_data_mappings.bal
+++ b/twitter/twitter_data_mappings.bal
@@ -16,7 +16,7 @@ isolated function convertToStatus(map<json> response) returns Status {
 }
 
 // Convert the array of json response into `Status` record array.
-function convertToStatuses(json[] response) returns Status[] {
+isolated function convertToStatuses(json[] response) returns Status[] {
     Status[] statuses = [];
     int i = 0;
     foreach json status in response {