diff --git a/Cargo.toml b/Cargo.toml
index 6b7522d..f8b97e3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "app-store-server-library"
 description = "The Rust server library for the App Store Server API, App Store Server Notifications and Advanced Commerce API"
-version = "4.1.2"
+version = "4.1.3"
 repository = "https://github.com/namecare/app-store-server-library-rust"
 homepage = "https://github.com/namecare/app-store-server-library-rust"
 authors = ["tkhp", "namecare"]
@@ -27,7 +27,7 @@ sha1 = { version = "0.10.6" }
 # Serialization
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = { version = "1.0.145" }
-serde_with = { version = "3.15.1", features = ["chrono"] }
+serde_with = { version = "3.16.0", features = ["chrono"] }
 serde_repr = "0.1.20"
 uuid = { version = "1.18.1", features = ["serde", "v4"] }
 chrono = { version = "0.4.42", features = ["serde"] }
diff --git a/README.md b/README.md
index 1ba74b4..9052e92 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ Specify `app-store-server-library` in your project's `Cargo.toml` file, under th
 
 ```toml
 [dependencies]
-app-store-server-library = { version = "4.1.2", features = ["receipt-utility", "api-client", "ocsp"] }
+app-store-server-library = { version = "4.1.3", features = ["receipt-utility", "api-client", "ocsp"] }
 ```
 
 ### Feature Flags
@@ -121,7 +121,7 @@ To enable OCSP verification:
 
 ```toml
 [dependencies]
-app-store-server-library = { version = "4.1.2", features = ["ocsp"] }
+app-store-server-library = { version = "4.1.3", features = ["ocsp"] }
 ```
 
 OCSP verification is performed automatically when verifying signed data.
diff --git a/src/api_client/api_client.rs b/src/api_client/api_client.rs
index 20560a5..b0b7308 100644
--- a/src/api_client/api_client.rs
+++ b/src/api_client/api_client.rs
@@ -133,7 +133,7 @@ impl<T: Transport, API, E: APIServiceErrorCode + DeserializeOwned> ApiClient<T,
         let mut request_builder = Request::builder()
             .method(method)
             .uri(url)
-            .header("User-Agent", "app-store-server-library/rust/4.1.2")
+            .header("User-Agent", "app-store-server-library/rust/4.1.3")
             .header("Authorization", format!("Bearer {}", self.generate_token()))
             .header("Accept", "application/json");
 
diff --git a/src/chain_verifier_ocsp.rs b/src/chain_verifier_ocsp.rs
index 2805cb7..8f13fe5 100644
--- a/src/chain_verifier_ocsp.rs
+++ b/src/chain_verifier_ocsp.rs
@@ -171,7 +171,7 @@ impl ChainVerifier {
 
         let response_bytes = ocsp_response
             .response_bytes
-            .ok_or(OcspError::ValidationError)?;
+            .ok_or_else(|| OcspError::ValidationError)?;
 
         const ID_PKIX_OCSP_BASIC: &str = "1.3.6.1.5.5.7.48.1.1";
         if response_bytes.response_type.to_string() != ID_PKIX_OCSP_BASIC {