diff --git a/uni-resolver-local/src/main/java/uniresolver/local/LocalUniDereferencer.java b/uni-resolver-local/src/main/java/uniresolver/local/LocalUniDereferencer.java
index 4f5d1302..23f352d2 100644
--- a/uni-resolver-local/src/main/java/uniresolver/local/LocalUniDereferencer.java
+++ b/uni-resolver-local/src/main/java/uniresolver/local/LocalUniDereferencer.java
@@ -71,7 +71,7 @@ public DereferenceResult dereference(String didUrlString, Map<String, Object> de
 
     public DereferenceResult dereference(String didUrlString, Map<String, Object> dereferenceOptions, Map<String, Object> initialExecutionState) throws ResolutionException, DereferencingException {
 
-        if (log.isDebugEnabled()) log.debug("dereference(" + didUrlString + ")  with options: " + dereferenceOptions);
+        if (log.isDebugEnabled()) log.debug("dereference(" + didUrlString + ") with options: " + dereferenceOptions);
 
         if (didUrlString == null) throw new NullPointerException();
         if (this.getUniResolver() == null) throw new ResolutionException("No resolver configured.");
@@ -145,7 +145,7 @@ public DereferenceResult dereference(String didUrlString, Map<String, Object> de
                 // resolve options = dereference options + DID parameters
 
                 Map<String, Object> resolveOptions = new HashMap<>(dereferenceOptions);
-                resolveOptions.put("accept", Representations.DEFAULT_MEDIA_TYPE);
+                if (! resolveOptions.containsKey("accept")) resolveOptions.put("accept", Representations.DEFAULT_MEDIA_TYPE);
                 if (didUrl.getParameters() != null) resolveOptions.putAll(didUrl.getParameters());
 
                 // resolve
diff --git a/uni-resolver-local/src/main/java/uniresolver/local/LocalUniResolver.java b/uni-resolver-local/src/main/java/uniresolver/local/LocalUniResolver.java
index 75a9ab0b..8ef4dd2e 100644
--- a/uni-resolver-local/src/main/java/uniresolver/local/LocalUniResolver.java
+++ b/uni-resolver-local/src/main/java/uniresolver/local/LocalUniResolver.java
@@ -59,7 +59,7 @@ public ResolveResult resolve(String didString, Map<String, Object> resolutionOpt
 
 	public ResolveResult resolve(String didString, Map<String, Object> resolutionOptions, Map<String, Object> initialExecutionState) throws ResolutionException {
 
-		if (log.isDebugEnabled()) log.debug("resolve(" + didString + ")  with options: " + resolutionOptions);
+		if (log.isDebugEnabled()) log.debug("resolve(" + didString + ") with options: " + resolutionOptions);
 
 		if (didString == null) throw new NullPointerException();
 		if (this.getDrivers() == null) throw new ResolutionException("No drivers configured.");