diff --git a/validator/client/src/main/java/tech/pegasys/teku/validator/client/proposerconfig/loader/ProposerConfigLoader.java b/validator/client/src/main/java/tech/pegasys/teku/validator/client/proposerconfig/loader/ProposerConfigLoader.java
index 63a5c3cb32a..291be3dba0b 100644
--- a/validator/client/src/main/java/tech/pegasys/teku/validator/client/proposerconfig/loader/ProposerConfigLoader.java
+++ b/validator/client/src/main/java/tech/pegasys/teku/validator/client/proposerconfig/loader/ProposerConfigLoader.java
@@ -18,6 +18,7 @@
 import java.io.IOException;
 import java.net.URL;
 import tech.pegasys.teku.infrastructure.exceptions.InvalidConfigurationException;
+import tech.pegasys.teku.infrastructure.http.UrlSanitizer;
 import tech.pegasys.teku.provider.JsonProvider;
 import tech.pegasys.teku.validator.client.ProposerConfig;
 
@@ -34,19 +35,22 @@ public ProposerConfigLoader(final ObjectMapper objectMapper) {
 
   public ProposerConfig getProposerConfig(final File source) {
     try {
-      final ProposerConfig proposerConfig = objectMapper.readValue(source, ProposerConfig.class);
-      return proposerConfig;
+      return objectMapper.readValue(source, ProposerConfig.class);
     } catch (IOException ex) {
-      throw new InvalidConfigurationException("Failed to proposer config from File " + source, ex);
+      throw new InvalidConfigurationException(
+          "Failed to load proposer config from file: " + source, ex);
     }
   }
 
   public ProposerConfig getProposerConfig(final URL source) {
     try {
-      final ProposerConfig proposerConfig = objectMapper.readValue(source, ProposerConfig.class);
-      return proposerConfig;
+      return objectMapper.readValue(source, ProposerConfig.class);
     } catch (IOException ex) {
-      throw new InvalidConfigurationException("Failed to proposer config from URL " + source, ex);
+
+      throw new InvalidConfigurationException(
+          "Failed to load proposer config from URL:"
+              + UrlSanitizer.sanitizePotentialUrl(source.toString()),
+          ex);
     }
   }
 }