diff --git a/ballerina/Ballerina.toml b/ballerina/Ballerina.toml
index 135ddb01..14a7d8f6 100644
--- a/ballerina/Ballerina.toml
+++ b/ballerina/Ballerina.toml
@@ -1,7 +1,7 @@
 [package]
 org = "ballerina"
 name = "oauth2"
-version = "2.12.0"
+version = "2.12.1"
 authors = ["Ballerina"]
 keywords = ["security", "authorization", "introspection"]
 repository = "https://github.com/ballerina-platform/module-ballerina-oauth2"
@@ -15,5 +15,5 @@ graalvmCompatible = true
 [[platform.java17.dependency]]
 groupId = "io.ballerina.stdlib"
 artifactId = "oauth2-native"
-version = "2.12.0"
-path = "../native/build/libs/oauth2-native-2.12.0.jar"
+version = "2.12.1"
+path = "../native/build/libs/oauth2-native-2.12.1-SNAPSHOT.jar"
diff --git a/ballerina/Dependencies.toml b/ballerina/Dependencies.toml
index e043308b..a600c25a 100644
--- a/ballerina/Dependencies.toml
+++ b/ballerina/Dependencies.toml
@@ -130,7 +130,7 @@ modules = [
 [[package]]
 org = "ballerina"
 name = "oauth2"
-version = "2.12.0"
+version = "2.12.1"
 dependencies = [
 	{org = "ballerina", name = "cache"},
 	{org = "ballerina", name = "crypto"},
diff --git a/ballerina/listener_oauth2_provider.bal b/ballerina/listener_oauth2_provider.bal
index 7b5daffd..435268f2 100644
--- a/ballerina/listener_oauth2_provider.bal
+++ b/ballerina/listener_oauth2_provider.bal
@@ -210,7 +210,7 @@ isolated function prepareIntrospectionResponse(json payload) returns Introspecti
                 introspectionResponse.tokenType = <string>payloadMap[key];
             }
             EXP => {
-                introspectionResponse.exp = <int>payloadMap[key];
+                introspectionResponse.exp = parseExpClaim(payloadMap[key]);
             }
             IAT => {
                 introspectionResponse.iat = <int>payloadMap[key];
@@ -239,7 +239,7 @@ isolated function prepareIntrospectionResponse(json payload) returns Introspecti
 }
 
 isolated function addToCache(cache:Cache oauth2Cache, string token, IntrospectionResponse response,
-                             decimal defaultTokenExpTime) {
+        decimal defaultTokenExpTime) {
     cache:Error? result;
     if response?.exp is int {
         result = oauth2Cache.put(token, response);
@@ -260,7 +260,7 @@ isolated function validateFromCache(cache:Cache oauth2Cache, string token) retur
         return;
     }
     if cachedEntry is any {
-        IntrospectionResponse response = <IntrospectionResponse> cachedEntry;
+        IntrospectionResponse response = <IntrospectionResponse>cachedEntry;
         int? expTime = response?.exp;
         // The `expTime` can be `()`. This means that the `defaultTokenExpTime` is not exceeded yet.
         // Hence, the token is still valid. If the `expTime` is provided in int, convert this to the current time and
@@ -278,3 +278,10 @@ isolated function validateFromCache(cache:Cache oauth2Cache, string token) retur
     }
     return;
 }
+
+isolated function parseExpClaim(json expClaim) returns int|() {
+    if expClaim is string {
+        return checkpanic int:fromString(expClaim);
+    } 
+    return <int>expClaim;
+}
diff --git a/ballerina/tests/listener_oauth2_provider_test.bal b/ballerina/tests/listener_oauth2_provider_test.bal
index 3540a1d6..9d56093f 100644
--- a/ballerina/tests/listener_oauth2_provider_test.bal
+++ b/ballerina/tests/listener_oauth2_provider_test.bal
@@ -545,3 +545,17 @@ isolated function testTokenIntrospectionRequestWithSecureSocketAndWithHttpUrlSch
     test:assertEquals(response?.jti, "JlbmMiOiJBMTI4Q0JDLUhTMjU2In");
     test:assertEquals(response?.jti, "JlbmMiOiJBMTI4Q0JDLUhTMjU2In");
 }
+
+// Test that the `exp` field is correctly parsed as an integer when given an example string value for `exp` field
+@test:Config {}
+isolated function testPrepareIntrospectionResponseWithStringExpClaim() {
+    json simulatedResponse = {
+        active: true,
+        exp: "1672531199",
+        scope: "read write",
+        client_id: "test_client_id",
+        username: "test_user"
+    };
+    IntrospectionResponse response = prepareIntrospectionResponse(simulatedResponse);
+    test:assertEquals(response.exp, 1672531199);
+}