diff --git a/jwt-opa/src/main/java/com/alertavert/opa/Constants.java b/jwt-opa/src/main/java/com/alertavert/opa/Constants.java
index e74452e..68aad04 100644
--- a/jwt-opa/src/main/java/com/alertavert/opa/Constants.java
+++ b/jwt-opa/src/main/java/com/alertavert/opa/Constants.java
@@ -83,6 +83,8 @@ public class Constants {
       + "({}) not an instance of ApiTokenAuthentication, cannot progress authorization";
   public static final String CANNOT_PARSE_AUTHORIZATION_REQUEST = "Cannot parse Authorization "
       + "request: {}";
+  public static final String ERROR_CANNOT_READ_KEY = "Could not read key: path = {}, algorithm = {}";
+
   public static final String API_TOKEN = "api_token";
 
   /**
diff --git a/jwt-opa/src/main/java/com/alertavert/opa/security/crypto/KeypairFileReader.java b/jwt-opa/src/main/java/com/alertavert/opa/security/crypto/KeypairFileReader.java
index ad75c55..a6db527 100644
--- a/jwt-opa/src/main/java/com/alertavert/opa/security/crypto/KeypairFileReader.java
+++ b/jwt-opa/src/main/java/com/alertavert/opa/security/crypto/KeypairFileReader.java
@@ -29,6 +29,8 @@
 import java.security.PrivateKey;
 import java.security.PublicKey;
 
+import static com.alertavert.opa.Constants.ERROR_CANNOT_READ_KEY;
+
 /**
  * <H2>KeypairFileReader</H2>
  *
@@ -49,15 +51,10 @@
  */
 @Slf4j @Value
 public class KeypairFileReader implements KeypairReader {
-
-  public static final String ERROR_CANNOT_READ_KEY =
-      "Could not read key: path = {}, algorithm = {}";
-
   String algorithm;
   Path secretKeyPath;
   Path publicKeyPath;
 
-
   @Override
   public KeyPair loadKeys() throws KeyLoadException {
     return new KeyPair(loadPublicKey(), loadPrivateKey());