diff --git a/src/main/java/de/bund/digitalservice/a2j/security/CachedBodyServletInputStream.java b/src/main/java/de/bund/digitalservice/a2j/security/CachedBodyServletInputStream.java
index 9195b09..a5e6752 100644
--- a/src/main/java/de/bund/digitalservice/a2j/security/CachedBodyServletInputStream.java
+++ b/src/main/java/de/bund/digitalservice/a2j/security/CachedBodyServletInputStream.java
@@ -5,6 +5,7 @@
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.UncheckedIOException;
 
 public class CachedBodyServletInputStream extends ServletInputStream {
 
@@ -24,7 +25,7 @@ public boolean isFinished() {
     try {
       return cachedBodyInputStream.available() == 0;
     } catch (IOException e) {
-      throw new RuntimeException(e);
+      throw new UncheckedIOException(e);
     }
   }
 
diff --git a/src/main/java/de/bund/digitalservice/a2j/security/CallbackVerificationFilter.java b/src/main/java/de/bund/digitalservice/a2j/security/CallbackVerificationFilter.java
index 6cf1f8e..55d5d05 100644
--- a/src/main/java/de/bund/digitalservice/a2j/security/CallbackVerificationFilter.java
+++ b/src/main/java/de/bund/digitalservice/a2j/security/CallbackVerificationFilter.java
@@ -19,7 +19,8 @@
 public class CallbackVerificationFilter extends OncePerRequestFilter {
   private final SenderClient senderClient;
   private final String callbackSecret;
-  private static final Logger filterLogger = LoggerFactory.getLogger(CallbackVerificationFilter.class);
+  private static final Logger filterLogger =
+      LoggerFactory.getLogger(CallbackVerificationFilter.class);
 
   public CallbackVerificationFilter(
       SenderClient senderClient, @Value("${fitConnect.callbackSecret}") String callbackSecret) {